diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fcf11e37e..9a445a4041 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,63 @@
+Changes in [3.30.0](https://github.com/vector-im/element-desktop/releases/tag/v3.30.0) (2021-09-14)
+===================================================================================================
+
+## ✨ Features
+ * Add bubble highlight styling ([\#6582](https://github.com/matrix-org/matrix-react-sdk/pull/6582)). Fixes vector-im/element-web#18295 and vector-im/element-web#18295. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * [Release] Add config option to turn on in-room event sending timing metrics  ([\#6773](https://github.com/matrix-org/matrix-react-sdk/pull/6773)).
+ * Create narrow mode for Composer ([\#6682](https://github.com/matrix-org/matrix-react-sdk/pull/6682)). Fixes vector-im/element-web#18533 and vector-im/element-web#18533.
+ * Prefer matrix.to alias links over room id in spaces & share ([\#6745](https://github.com/matrix-org/matrix-react-sdk/pull/6745)). Fixes vector-im/element-web#18796 and vector-im/element-web#18796.
+ * Stop automatic playback of voice messages if a non-voice message is encountered ([\#6728](https://github.com/matrix-org/matrix-react-sdk/pull/6728)). Fixes vector-im/element-web#18850 and vector-im/element-web#18850.
+ * Show call length during a call ([\#6700](https://github.com/matrix-org/matrix-react-sdk/pull/6700)). Fixes vector-im/element-web#18566 and vector-im/element-web#18566. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Serialize and retry mass-leave when leaving space ([\#6737](https://github.com/matrix-org/matrix-react-sdk/pull/6737)). Fixes vector-im/element-web#18789 and vector-im/element-web#18789.
+ * Improve form handling in and around space creation ([\#6739](https://github.com/matrix-org/matrix-react-sdk/pull/6739)). Fixes vector-im/element-web#18775 and vector-im/element-web#18775.
+ * Split autoplay GIFs and videos into different settings ([\#6726](https://github.com/matrix-org/matrix-react-sdk/pull/6726)). Fixes vector-im/element-web#5771 and vector-im/element-web#5771. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Add autoplay for voice messages ([\#6710](https://github.com/matrix-org/matrix-react-sdk/pull/6710)). Fixes vector-im/element-web#18804, vector-im/element-web#18715, vector-im/element-web#18714 vector-im/element-web#17961 and vector-im/element-web#18804.
+ * Allow to use basic html to format invite messages ([\#6703](https://github.com/matrix-org/matrix-react-sdk/pull/6703)). Fixes vector-im/element-web#15738 and vector-im/element-web#15738. Contributed by [skolmer](https://github.com/skolmer).
+ * Allow widgets, when eligible, to interact with more rooms as per MSC2762 ([\#6684](https://github.com/matrix-org/matrix-react-sdk/pull/6684)).
+ * Remove arbitrary limits from send/receive events for widgets ([\#6719](https://github.com/matrix-org/matrix-react-sdk/pull/6719)). Fixes vector-im/element-web#17994 and vector-im/element-web#17994.
+ * Reload suggested rooms if we see the state change down /sync ([\#6715](https://github.com/matrix-org/matrix-react-sdk/pull/6715)). Fixes vector-im/element-web#18761 and vector-im/element-web#18761.
+ * When creating private spaces, make the initial rooms restricted if supported ([\#6721](https://github.com/matrix-org/matrix-react-sdk/pull/6721)). Fixes vector-im/element-web#18722 and vector-im/element-web#18722.
+ * Threading exploration work ([\#6658](https://github.com/matrix-org/matrix-react-sdk/pull/6658)). Fixes vector-im/element-web#18532 and vector-im/element-web#18532.
+ * Default to `Don't leave any` when leaving a space ([\#6697](https://github.com/matrix-org/matrix-react-sdk/pull/6697)). Fixes vector-im/element-web#18592 and vector-im/element-web#18592. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Special case redaction event sending from widgets per MSC2762 ([\#6686](https://github.com/matrix-org/matrix-react-sdk/pull/6686)). Fixes vector-im/element-web#18573 and vector-im/element-web#18573.
+ * Add active speaker indicators ([\#6639](https://github.com/matrix-org/matrix-react-sdk/pull/6639)). Fixes vector-im/element-web#17627 and vector-im/element-web#17627. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Increase general app performance by optimizing layers ([\#6644](https://github.com/matrix-org/matrix-react-sdk/pull/6644)). Fixes vector-im/element-web#18730 and vector-im/element-web#18730. Contributed by [Palid](https://github.com/Palid).
+
+## 🐛 Bug Fixes
+ * Fix autocomplete not having y-scroll ([\#6802](https://github.com/matrix-org/matrix-react-sdk/pull/6802)).
+ * Fix emoji picker and stickerpicker not appearing correctly when opened ([\#6801](https://github.com/matrix-org/matrix-react-sdk/pull/6801)).
+ * Debounce read marker update on scroll ([\#6774](https://github.com/matrix-org/matrix-react-sdk/pull/6774)).
+ * Fix Space creation wizard go to my first room button behaviour ([\#6748](https://github.com/matrix-org/matrix-react-sdk/pull/6748)). Fixes vector-im/element-web#18764 and vector-im/element-web#18764.
+ * Fix scroll being stuck at bottom ([\#6751](https://github.com/matrix-org/matrix-react-sdk/pull/6751)). Fixes vector-im/element-web#18903 and vector-im/element-web#18903.
+ * Fix widgets not remembering identity verification when asked to. ([\#6742](https://github.com/matrix-org/matrix-react-sdk/pull/6742)). Fixes vector-im/element-web#15631 and vector-im/element-web#15631.
+ * Add missing pluralisation i18n strings for Spaces ([\#6738](https://github.com/matrix-org/matrix-react-sdk/pull/6738)). Fixes vector-im/element-web#18780 and vector-im/element-web#18780.
+ * Make ForgotPassword UX slightly more user friendly ([\#6636](https://github.com/matrix-org/matrix-react-sdk/pull/6636)). Fixes vector-im/element-web#11531 and vector-im/element-web#11531. Contributed by [Palid](https://github.com/Palid).
+ * Don't context switch room on SpaceStore ready as it can break permalinks ([\#6730](https://github.com/matrix-org/matrix-react-sdk/pull/6730)). Fixes vector-im/element-web#17974 and vector-im/element-web#17974.
+ * Fix explore rooms button not working during space creation wizard ([\#6729](https://github.com/matrix-org/matrix-react-sdk/pull/6729)). Fixes vector-im/element-web#18762 and vector-im/element-web#18762.
+ * Fix bug where one party's media would sometimes not be shown ([\#6731](https://github.com/matrix-org/matrix-react-sdk/pull/6731)).
+ * Only make the initial space rooms suggested by default ([\#6714](https://github.com/matrix-org/matrix-react-sdk/pull/6714)). Fixes vector-im/element-web#18760 and vector-im/element-web#18760.
+ * Replace fake username in EventTilePreview with a proper loading state ([\#6702](https://github.com/matrix-org/matrix-react-sdk/pull/6702)). Fixes vector-im/element-web#15897 and vector-im/element-web#15897. Contributed by [skolmer](https://github.com/skolmer).
+ * Don't send prehistorical events to widgets during decryption at startup ([\#6695](https://github.com/matrix-org/matrix-react-sdk/pull/6695)). Fixes vector-im/element-web#18060 and vector-im/element-web#18060.
+ * When creating subspaces properly set restricted join rule ([\#6725](https://github.com/matrix-org/matrix-react-sdk/pull/6725)). Fixes vector-im/element-web#18797 and vector-im/element-web#18797.
+ * Fix the Image View not openning for some pinned messages ([\#6723](https://github.com/matrix-org/matrix-react-sdk/pull/6723)). Fixes vector-im/element-web#18422 and vector-im/element-web#18422. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Show autocomplete sections vertically ([\#6722](https://github.com/matrix-org/matrix-react-sdk/pull/6722)). Fixes vector-im/element-web#18860 and vector-im/element-web#18860. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Fix EmojiPicker filtering to lower case emojibase data strings ([\#6717](https://github.com/matrix-org/matrix-react-sdk/pull/6717)). Fixes vector-im/element-web#18686 and vector-im/element-web#18686.
+ * Clear currentRoomId when viewing home page, fixing document title ([\#6716](https://github.com/matrix-org/matrix-react-sdk/pull/6716)). Fixes vector-im/element-web#18668 and vector-im/element-web#18668.
+ * Fix membership updates to Spaces not applying in real-time ([\#6713](https://github.com/matrix-org/matrix-react-sdk/pull/6713)). Fixes vector-im/element-web#18737 and vector-im/element-web#18737.
+ * Don't show a double stacked invite modals when inviting to Spaces ([\#6698](https://github.com/matrix-org/matrix-react-sdk/pull/6698)). Fixes vector-im/element-web#18745 and vector-im/element-web#18745. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Remove non-functional DuckDuckGo Autocomplete Provider ([\#6712](https://github.com/matrix-org/matrix-react-sdk/pull/6712)). Fixes vector-im/element-web#18778 and vector-im/element-web#18778.
+ * Filter members on `MemberList` load ([\#6708](https://github.com/matrix-org/matrix-react-sdk/pull/6708)). Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Fix improper voice messages being produced in Firefox and sometimes other browsers. ([\#6696](https://github.com/matrix-org/matrix-react-sdk/pull/6696)). Fixes vector-im/element-web#18587 and vector-im/element-web#18587.
+ * Fix client forgetting which capabilities a widget was approved for ([\#6685](https://github.com/matrix-org/matrix-react-sdk/pull/6685)). Fixes vector-im/element-web#18786 and vector-im/element-web#18786.
+ * Fix left panel widgets not remembering collapsed state ([\#6687](https://github.com/matrix-org/matrix-react-sdk/pull/6687)). Fixes vector-im/element-web#17803 and vector-im/element-web#17803.
+ * Fix changelog link colour back to blue ([\#6692](https://github.com/matrix-org/matrix-react-sdk/pull/6692)). Fixes vector-im/element-web#18726 and vector-im/element-web#18726.
+ * Soften codeblock border color ([\#6564](https://github.com/matrix-org/matrix-react-sdk/pull/6564)). Fixes vector-im/element-web#18367 and vector-im/element-web#18367. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Pause ringing more aggressively ([\#6691](https://github.com/matrix-org/matrix-react-sdk/pull/6691)). Fixes vector-im/element-web#18588 and vector-im/element-web#18588. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Fix command autocomplete ([\#6680](https://github.com/matrix-org/matrix-react-sdk/pull/6680)). Fixes vector-im/element-web#18670 and vector-im/element-web#18670. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Don't re-sort the room-list based on profile/status changes ([\#6595](https://github.com/matrix-org/matrix-react-sdk/pull/6595)). Fixes vector-im/element-web#110 and vector-im/element-web#110. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Fix codeblock formatting with syntax highlighting on ([\#6681](https://github.com/matrix-org/matrix-react-sdk/pull/6681)). Fixes vector-im/element-web#18739 vector-im/element-web#18365 and vector-im/element-web#18739. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+ * Add padding to the Add button in the notification settings ([\#6665](https://github.com/matrix-org/matrix-react-sdk/pull/6665)). Fixes vector-im/element-web#18706 and vector-im/element-web#18706. Contributed by [SimonBrandner](https://github.com/SimonBrandner).
+
 Changes in [3.29.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.29.1) (2021-09-13)
 ===================================================================================================
 
diff --git a/package.json b/package.json
index 9be65598e4..532e4218d1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "matrix-react-sdk",
-  "version": "3.29.1",
+  "version": "3.30.0",
   "description": "SDK for matrix.org using React",
   "author": "matrix.org",
   "repository": {
diff --git a/res/css/structures/_SpacePanel.scss b/res/css/structures/_SpacePanel.scss
index bbb1867f16..29c8c0c36d 100644
--- a/res/css/structures/_SpacePanel.scss
+++ b/res/css/structures/_SpacePanel.scss
@@ -139,7 +139,6 @@ $activeBorderColor: $secondary-content;
         &:not(.mx_SpaceButton_narrow) {
             .mx_SpaceButton_selectionWrapper {
                 width: 100%;
-                padding-right: 16px;
                 overflow: hidden;
             }
         }
@@ -151,7 +150,6 @@ $activeBorderColor: $secondary-content;
             display: block;
             text-overflow: ellipsis;
             overflow: hidden;
-            padding-right: 8px;
             font-size: $font-14px;
             line-height: $font-18px;
         }
@@ -225,8 +223,7 @@ $activeBorderColor: $secondary-content;
             margin-top: auto;
             margin-bottom: auto;
             display: none;
-            position: absolute;
-            right: 4px;
+            position: relative;
 
             &::before {
                 top: 2px;
@@ -245,8 +242,6 @@ $activeBorderColor: $secondary-content;
     }
 
     .mx_SpacePanel_badgeContainer {
-        position: absolute;
-
         // Create a flexbox to make aligning dot badges easier
         display: flex;
         align-items: center;
@@ -264,6 +259,7 @@ $activeBorderColor: $secondary-content;
     &.collapsed {
         .mx_SpaceButton {
             .mx_SpacePanel_badgeContainer {
+                position: absolute;
                 right: 0;
                 top: 0;
 
@@ -293,19 +289,12 @@ $activeBorderColor: $secondary-content;
     }
 
     &:not(.collapsed) {
-        .mx_SpacePanel_badgeContainer {
-            position: absolute;
-            right: 4px;
-        }
-
         .mx_SpaceButton:hover,
         .mx_SpaceButton:focus-within,
         .mx_SpaceButton_hasMenuOpen {
             &:not(.mx_SpaceButton_invite) {
                 // Hide the badge container on hover because it'll be a menu button
                 .mx_SpacePanel_badgeContainer {
-                    width: 0;
-                    height: 0;
                     display: none;
                 }
 
diff --git a/res/css/views/rooms/_Autocomplete.scss b/res/css/views/rooms/_Autocomplete.scss
index 8d2b338d9d..fcdab37f5a 100644
--- a/res/css/views/rooms/_Autocomplete.scss
+++ b/res/css/views/rooms/_Autocomplete.scss
@@ -7,7 +7,6 @@
     background: $background;
     border-bottom: none;
     border-radius: 8px 8px 0 0;
-    max-height: 35vh;
     overflow: clip;
     display: flex;
     flex-direction: column;
@@ -64,6 +63,7 @@
     margin: 12px;
     height: 100%;
     overflow-y: scroll;
+    max-height: 35vh;
 }
 
 .mx_Autocomplete_Completion_container_truncate {
diff --git a/src/components/structures/ContextMenu.tsx b/src/components/structures/ContextMenu.tsx
index 332b6cd318..d65f8e3a10 100644
--- a/src/components/structures/ContextMenu.tsx
+++ b/src/components/structures/ContextMenu.tsx
@@ -322,10 +322,16 @@ export class ContextMenu extends React.PureComponent<IProps, IState> {
 
         const menuClasses = classNames({
             'mx_ContextualMenu': true,
-            'mx_ContextualMenu_left': !hasChevron && position.left,
-            'mx_ContextualMenu_right': !hasChevron && position.right,
-            'mx_ContextualMenu_top': !hasChevron && position.top,
-            'mx_ContextualMenu_bottom': !hasChevron && position.bottom,
+            /**
+             * In some cases we may get the number of 0, which still means that we're supposed to properly
+             * add the specific position class, but as it was falsy things didn't work as intended.
+             * In addition, defensively check for counter cases where we may get more than one value,
+             * even if we shouldn't.
+             */
+            'mx_ContextualMenu_left': !hasChevron && position.left !== undefined && !position.right,
+            'mx_ContextualMenu_right': !hasChevron && position.right !== undefined && !position.left,
+            'mx_ContextualMenu_top': !hasChevron && position.top !== undefined && !position.bottom,
+            'mx_ContextualMenu_bottom': !hasChevron && position.bottom !== undefined && !position.top,
             'mx_ContextualMenu_withChevron_left': chevronFace === ChevronFace.Left,
             'mx_ContextualMenu_withChevron_right': chevronFace === ChevronFace.Right,
             'mx_ContextualMenu_withChevron_top': chevronFace === ChevronFace.Top,
@@ -404,17 +410,27 @@ export class ContextMenu extends React.PureComponent<IProps, IState> {
     }
 }
 
+export type ToRightOf = {
+    left: number;
+    top: number;
+    chevronOffset: number;
+};
+
 // Placement method for <ContextMenu /> to position context menu to right of elementRect with chevronOffset
-export const toRightOf = (elementRect: Pick<DOMRect, "right" | "top" | "height">, chevronOffset = 12) => {
+export const toRightOf = (elementRect: Pick<DOMRect, "right" | "top" | "height">, chevronOffset = 12): ToRightOf => {
     const left = elementRect.right + window.pageXOffset + 3;
     let top = elementRect.top + (elementRect.height / 2) + window.pageYOffset;
     top -= chevronOffset + 8; // where 8 is half the height of the chevron
     return { left, top, chevronOffset };
 };
 
+export type AboveLeftOf = IPosition & {
+    chevronFace: ChevronFace;
+};
+
 // Placement method for <ContextMenu /> to position context menu right-aligned and flowing to the left of elementRect,
 // and either above or below: wherever there is more space (maybe this should be aboveOrBelowLeftOf?)
-export const aboveLeftOf = (elementRect: DOMRect, chevronFace = ChevronFace.None, vPadding = 0) => {
+export const aboveLeftOf = (elementRect: DOMRect, chevronFace = ChevronFace.None, vPadding = 0): AboveLeftOf => {
     const menuOptions: IPosition & { chevronFace: ChevronFace } = { chevronFace };
 
     const buttonRight = elementRect.right + window.pageXOffset;
diff --git a/src/components/structures/SpaceHierarchy.tsx b/src/components/structures/SpaceHierarchy.tsx
index a0d4d9c42a..09099032dc 100644
--- a/src/components/structures/SpaceHierarchy.tsx
+++ b/src/components/structures/SpaceHierarchy.tsx
@@ -57,6 +57,7 @@ import { Key } from "../../Keyboard";
 import { IState, RovingTabIndexProvider, useRovingTabIndex } from "../../accessibility/RovingTabIndex";
 import { getDisplayAliasForRoom } from "./RoomDirectory";
 import MatrixClientContext from "../../contexts/MatrixClientContext";
+import { useEventEmitterState } from "../../hooks/useEventEmitter";
 
 interface IProps {
     space: Room;
@@ -87,7 +88,8 @@ const Tile: React.FC<ITileProps> = ({
 }) => {
     const cli = useContext(MatrixClientContext);
     const joinedRoom = cli.getRoom(room.room_id)?.getMyMembership() === "join" ? cli.getRoom(room.room_id) : null;
-    const name = joinedRoom?.name || room.name || room.canonical_alias || room.aliases?.[0]
+    const joinedRoomName = useEventEmitterState(joinedRoom, "Room.name", room => room?.name);
+    const name = joinedRoomName || room.name || room.canonical_alias || room.aliases?.[0]
         || (room.room_type === RoomType.Space ? _t("Unnamed Space") : _t("Unnamed Room"));
 
     const [showChildren, toggleShowChildren] = useStateToggle(true);
diff --git a/src/components/structures/SpaceRoomView.tsx b/src/components/structures/SpaceRoomView.tsx
index 6bb0433448..3837d26564 100644
--- a/src/components/structures/SpaceRoomView.tsx
+++ b/src/components/structures/SpaceRoomView.tsx
@@ -78,6 +78,7 @@ import { CreateEventField, IGroupSummary } from "../views/dialogs/CreateSpaceFro
 import { useAsyncMemo } from "../../hooks/useAsyncMemo";
 import Spinner from "../views/elements/Spinner";
 import GroupAvatar from "../views/avatars/GroupAvatar";
+import { useDispatcher } from "../../hooks/useDispatcher";
 
 interface IProps {
     space: Room;
@@ -191,6 +192,11 @@ interface ISpacePreviewProps {
 const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }: ISpacePreviewProps) => {
     const cli = useContext(MatrixClientContext);
     const myMembership = useMyRoomMembership(space);
+    useDispatcher(defaultDispatcher, payload => {
+        if (payload.action === Action.JoinRoomError && payload.roomId === space.roomId) {
+            setBusy(false); // stop the spinner, join failed
+        }
+    });
 
     const [busy, setBusy] = useState(false);
 
diff --git a/src/components/views/right_panel/UserInfo.tsx b/src/components/views/right_panel/UserInfo.tsx
index f90643f1df..4446ee1415 100644
--- a/src/components/views/right_panel/UserInfo.tsx
+++ b/src/components/views/right_panel/UserInfo.tsx
@@ -826,7 +826,7 @@ const RoomAdminToolsContainer: React.FC<IBaseRoomProps> = ({
     if (canAffectUser && me.powerLevel >= banPowerLevel) {
         banButton = <BanToggleButton member={member} startUpdating={startUpdating} stopUpdating={stopUpdating} />;
     }
-    if (canAffectUser && me.powerLevel >= editPowerLevel) {
+    if (canAffectUser && me.powerLevel >= editPowerLevel && !room.isSpaceRoom()) {
         muteButton = (
             <MuteToggleButton
                 member={member}
diff --git a/src/components/views/rooms/MessageComposer.tsx b/src/components/views/rooms/MessageComposer.tsx
index dd6ce10825..506bf09a92 100644
--- a/src/components/views/rooms/MessageComposer.tsx
+++ b/src/components/views/rooms/MessageComposer.tsx
@@ -32,6 +32,7 @@ import {
     ContextMenu,
     useContextMenu,
     MenuItem,
+    AboveLeftOf,
 } from "../../structures/ContextMenu";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import ReplyPreview from "./ReplyPreview";
@@ -511,7 +512,7 @@ export default class MessageComposer extends React.Component<IProps, IState> {
                 null,
         ];
 
-        let menuPosition;
+        let menuPosition: AboveLeftOf | undefined;
         if (this.ref.current) {
             const contentRect = this.ref.current.getBoundingClientRect();
             menuPosition = aboveLeftOf(contentRect);
diff --git a/src/components/views/rooms/NotificationBadge.tsx b/src/components/views/rooms/NotificationBadge.tsx
index 8329de7391..a97d51fc90 100644
--- a/src/components/views/rooms/NotificationBadge.tsx
+++ b/src/components/views/rooms/NotificationBadge.tsx
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from "react";
+import React, { MouseEvent } from "react";
 import classNames from "classnames";
 import { formatCount } from "../../../utils/FormattingUtils";
 import SettingsStore from "../../../settings/SettingsStore";
@@ -22,6 +22,9 @@ import AccessibleButton from "../elements/AccessibleButton";
 import { XOR } from "../../../@types/common";
 import { NOTIFICATION_STATE_UPDATE, NotificationState } from "../../../stores/notifications/NotificationState";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
+import Tooltip from "../elements/Tooltip";
+import { _t } from "../../../languageHandler";
+import { NotificationColor } from "../../../stores/notifications/NotificationColor";
 
 interface IProps {
     notification: NotificationState;
@@ -39,6 +42,7 @@ interface IProps {
 }
 
 interface IClickableProps extends IProps, React.InputHTMLAttributes<Element> {
+    showUnsentTooltip?: boolean;
     /**
      * If specified will return an AccessibleButton instead of a div.
      */
@@ -47,6 +51,7 @@ interface IClickableProps extends IProps, React.InputHTMLAttributes<Element> {
 
 interface IState {
     showCounts: boolean; // whether or not to show counts. Independent of props.forceCount
+    showTooltip: boolean;
 }
 
 @replaceableComponent("views.rooms.NotificationBadge")
@@ -59,6 +64,7 @@ export default class NotificationBadge extends React.PureComponent<XOR<IProps, I
 
         this.state = {
             showCounts: SettingsStore.getValue("Notifications.alwaysShowBadgeCounts", this.roomId),
+            showTooltip: false,
         };
 
         this.countWatcherRef = SettingsStore.watchSetting(
@@ -93,9 +99,22 @@ export default class NotificationBadge extends React.PureComponent<XOR<IProps, I
         this.forceUpdate(); // notification state changed - update
     };
 
+    private onMouseOver = (e: MouseEvent) => {
+        e.stopPropagation();
+        this.setState({
+            showTooltip: true,
+        });
+    };
+
+    private onMouseLeave = () => {
+        this.setState({
+            showTooltip: false,
+        });
+    };
+
     public render(): React.ReactElement {
         /* eslint @typescript-eslint/no-unused-vars: ["error", { "ignoreRestSiblings": true }] */
-        const { notification, forceCount, roomId, onClick, ...props } = this.props;
+        const { notification, showUnsentTooltip, forceCount, roomId, onClick, ...props } = this.props;
 
         // Don't show a badge if we don't need to
         if (notification.isIdle) return null;
@@ -124,9 +143,24 @@ export default class NotificationBadge extends React.PureComponent<XOR<IProps, I
         });
 
         if (onClick) {
+            let label: string;
+            let tooltip: JSX.Element;
+            if (showUnsentTooltip && this.state.showTooltip && notification.color === NotificationColor.Unsent) {
+                label = _t("Message didn't send. Click for info.");
+                tooltip = <Tooltip className="mx_RoleButton_tooltip" label={label} />;
+            }
+
             return (
-                <AccessibleButton {...props} className={classes} onClick={onClick}>
+                <AccessibleButton
+                    aria-label={label}
+                    {...props}
+                    className={classes}
+                    onClick={onClick}
+                    onMouseOver={this.onMouseOver}
+                    onMouseLeave={this.onMouseLeave}
+                >
                     <span className="mx_NotificationBadge_count">{ symbol }</span>
+                    { tooltip }
                 </AccessibleButton>
             );
         }
diff --git a/src/components/views/rooms/RoomSublist.tsx b/src/components/views/rooms/RoomSublist.tsx
index cf82040793..3c9f0ea65e 100644
--- a/src/components/views/rooms/RoomSublist.tsx
+++ b/src/components/views/rooms/RoomSublist.tsx
@@ -670,6 +670,7 @@ export default class RoomSublist extends React.Component<IProps, IState> {
                             onClick={this.onBadgeClick}
                             tabIndex={tabIndex}
                             aria-label={ariaLabel}
+                            showUnsentTooltip={true}
                         />
                     );
 
diff --git a/src/components/views/rooms/RoomTile.tsx b/src/components/views/rooms/RoomTile.tsx
index 4d6de10e1f..970915d653 100644
--- a/src/components/views/rooms/RoomTile.tsx
+++ b/src/components/views/rooms/RoomTile.tsx
@@ -17,7 +17,6 @@ limitations under the License.
 
 import React, { createRef } from "react";
 import { Room } from "matrix-js-sdk/src/models/room";
-import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 import classNames from "classnames";
 import { RovingTabIndexWrapper } from "../../../accessibility/RovingTabIndex";
 import AccessibleButton, { ButtonEvent } from "../../views/elements/AccessibleButton";
@@ -51,8 +50,6 @@ import IconizedContextMenu, {
 } from "../context_menus/IconizedContextMenu";
 import { CommunityPrototypeStore, IRoomProfile } from "../../../stores/CommunityPrototypeStore";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
-import { getUnsentMessages } from "../../structures/RoomStatusBar";
-import { StaticNotificationState } from "../../../stores/notifications/StaticNotificationState";
 
 interface IProps {
     room: Room;
@@ -68,7 +65,6 @@ interface IState {
     notificationsMenuPosition: PartialDOMRect;
     generalMenuPosition: PartialDOMRect;
     messagePreview?: string;
-    hasUnsentEvents: boolean;
 }
 
 const messagePreviewId = (roomId: string) => `mx_RoomTile_messagePreview_${roomId}`;
@@ -95,7 +91,6 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
             selected: ActiveRoomObserver.activeRoomId === this.props.room.roomId,
             notificationsMenuPosition: null,
             generalMenuPosition: null,
-            hasUnsentEvents: this.countUnsentEvents() > 0,
 
             // generatePreview() will return nothing if the user has previews disabled
             messagePreview: "",
@@ -106,11 +101,7 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         this.roomProps = EchoChamber.forRoom(this.props.room);
     }
 
-    private countUnsentEvents(): number {
-        return getUnsentMessages(this.props.room).length;
-    }
-
-    private onRoomNameUpdate = (room) => {
+    private onRoomNameUpdate = (room: Room) => {
         this.forceUpdate();
     };
 
@@ -118,11 +109,6 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         this.forceUpdate(); // notification state changed - update
     };
 
-    private onLocalEchoUpdated = (ev: MatrixEvent, room: Room) => {
-        if (room?.roomId !== this.props.room.roomId) return;
-        this.setState({ hasUnsentEvents: this.countUnsentEvents() > 0 });
-    };
-
     private onRoomPropertyUpdate = (property: CachedRoomKey) => {
         if (property === CachedRoomKey.NotificationVolume) this.onNotificationUpdate();
         // else ignore - not important for this tile
@@ -178,12 +164,11 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         );
         this.notificationState.on(NOTIFICATION_STATE_UPDATE, this.onNotificationUpdate);
         this.roomProps.on(PROPERTY_UPDATED, this.onRoomPropertyUpdate);
-        this.roomProps.on("Room.name", this.onRoomNameUpdate);
+        this.props.room?.on("Room.name", this.onRoomNameUpdate);
         CommunityPrototypeStore.instance.on(
             CommunityPrototypeStore.getUpdateEventName(this.props.room.roomId),
             this.onCommunityUpdate,
         );
-        MatrixClientPeg.get().on("Room.localEchoUpdated", this.onLocalEchoUpdated);
     }
 
     public componentWillUnmount() {
@@ -208,7 +193,6 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
             CommunityPrototypeStore.getUpdateEventName(this.props.room.roomId),
             this.onCommunityUpdate,
         );
-        MatrixClientPeg.get()?.removeListener("Room.localEchoUpdated", this.onLocalEchoUpdated);
     }
 
     private onAction = (payload: ActionPayload) => {
@@ -587,30 +571,17 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         />;
 
         let badge: React.ReactNode;
-        if (!this.props.isMinimized) {
+        if (!this.props.isMinimized && this.notificationState) {
             // aria-hidden because we summarise the unread count/highlight status in a manual aria-label below
-            if (this.state.hasUnsentEvents) {
-                // hardcode the badge to a danger state when there's unsent messages
-                badge = (
-                    <div className="mx_RoomTile_badgeContainer" aria-hidden="true">
-                        <NotificationBadge
-                            notification={StaticNotificationState.RED_EXCLAMATION}
-                            forceCount={false}
-                            roomId={this.props.room.roomId}
-                        />
-                    </div>
-                );
-            } else if (this.notificationState) {
-                badge = (
-                    <div className="mx_RoomTile_badgeContainer" aria-hidden="true">
-                        <NotificationBadge
-                            notification={this.notificationState}
-                            forceCount={false}
-                            roomId={this.props.room.roomId}
-                        />
-                    </div>
-                );
-            }
+            badge = (
+                <div className="mx_RoomTile_badgeContainer" aria-hidden="true">
+                    <NotificationBadge
+                        notification={this.notificationState}
+                        forceCount={false}
+                        roomId={this.props.room.roomId}
+                    />
+                </div>
+            );
         }
 
         let messagePreview = null;
diff --git a/src/components/views/spaces/SpaceCreateMenu.tsx b/src/components/views/spaces/SpaceCreateMenu.tsx
index 59c970c7d0..c09b26e45f 100644
--- a/src/components/views/spaces/SpaceCreateMenu.tsx
+++ b/src/components/views/spaces/SpaceCreateMenu.tsx
@@ -97,9 +97,8 @@ const spaceNameValidator = withValidation({
     ],
 });
 
-const nameToAlias = (name: string, domain: string): string => {
-    const localpart = name.trim().toLowerCase().replace(/\s+/g, "-").replace(/[^a-z0-9_-]+/gi, "");
-    return `#${localpart}:${domain}`;
+const nameToLocalpart = (name: string): string => {
+    return name.trim().toLowerCase().replace(/\s+/g, "-").replace(/[^a-z0-9_-]+/gi, "");
 };
 
 // XXX: Temporary for the Spaces release only
@@ -176,8 +175,9 @@ export const SpaceCreateForm: React.FC<ISpaceCreateFormProps> = ({
             value={name}
             onChange={ev => {
                 const newName = ev.target.value;
-                if (!alias || alias === nameToAlias(name, domain)) {
-                    setAlias(nameToAlias(newName, domain));
+                if (!alias || alias === `#${nameToLocalpart(name)}:${domain}`) {
+                    setAlias(`#${nameToLocalpart(newName)}:${domain}`);
+                    aliasFieldRef.current?.validate({ allowEmpty: true });
                 }
                 setName(newName);
             }}
@@ -194,7 +194,7 @@ export const SpaceCreateForm: React.FC<ISpaceCreateFormProps> = ({
                 onChange={setAlias}
                 domain={domain}
                 value={alias}
-                placeholder={name ? nameToAlias(name, domain) : _t("e.g. my-space")}
+                placeholder={name ? nameToLocalpart(name) : _t("e.g. my-space")}
                 label={_t("Address")}
                 disabled={busy}
                 onKeyDown={onKeyDown}
@@ -217,6 +217,7 @@ export const SpaceCreateForm: React.FC<ISpaceCreateFormProps> = ({
 };
 
 const SpaceCreateMenu = ({ onFinished }) => {
+    const cli = useContext(MatrixClientContext);
     const [visibility, setVisibility] = useState<Visibility>(null);
     const [busy, setBusy] = useState<boolean>(false);
 
@@ -233,14 +234,18 @@ const SpaceCreateMenu = ({ onFinished }) => {
 
         setBusy(true);
         // require & validate the space name field
-        if (!await spaceNameField.current.validate({ allowEmpty: false })) {
+        if (!(await spaceNameField.current.validate({ allowEmpty: false }))) {
             spaceNameField.current.focus();
             spaceNameField.current.validate({ allowEmpty: false, focused: true });
             setBusy(false);
             return;
         }
-        // validate the space name alias field but do not require it
-        if (visibility === Visibility.Public && !await spaceAliasField.current.validate({ allowEmpty: true })) {
+
+        // validate the space alias field but do not require it
+        const aliasLocalpart = alias.substring(1, alias.length - cli.getDomain().length - 1);
+        if (visibility === Visibility.Public && aliasLocalpart &&
+            (await spaceAliasField.current.validate({ allowEmpty: true })) === false
+        ) {
             spaceAliasField.current.focus();
             spaceAliasField.current.validate({ allowEmpty: true, focused: true });
             setBusy(false);
@@ -248,7 +253,13 @@ const SpaceCreateMenu = ({ onFinished }) => {
         }
 
         try {
-            await createSpace(name, visibility === Visibility.Public, alias, topic, avatar);
+            await createSpace(
+                name,
+                visibility === Visibility.Public,
+                aliasLocalpart ? alias : undefined,
+                topic,
+                avatar,
+            );
 
             onFinished();
         } catch (e) {
diff --git a/src/components/views/spaces/SpaceTreeLevel.tsx b/src/components/views/spaces/SpaceTreeLevel.tsx
index 35c0275240..df6c4c8149 100644
--- a/src/components/views/spaces/SpaceTreeLevel.tsx
+++ b/src/components/views/spaces/SpaceTreeLevel.tsx
@@ -93,6 +93,7 @@ export const SpaceButton: React.FC<IButtonProps> = ({
                 notification={notificationState}
                 aria-label={ariaLabel}
                 tabIndex={tabIndex}
+                showUnsentTooltip={true}
             />
         </div>;
     }
diff --git a/src/hooks/useEventEmitter.ts b/src/hooks/useEventEmitter.ts
index 74b23f0198..693eebc0e3 100644
--- a/src/hooks/useEventEmitter.ts
+++ b/src/hooks/useEventEmitter.ts
@@ -20,7 +20,11 @@ import type { EventEmitter } from "events";
 type Handler = (...args: any[]) => void;
 
 // Hook to wrap event emitter on and removeListener in hook lifecycle
-export const useEventEmitter = (emitter: EventEmitter, eventName: string | symbol, handler: Handler) => {
+export const useEventEmitter = (
+    emitter: EventEmitter | undefined,
+    eventName: string | symbol,
+    handler: Handler,
+) => {
     // Create a ref that stores handler
     const savedHandler = useRef(handler);
 
@@ -51,7 +55,11 @@ export const useEventEmitter = (emitter: EventEmitter, eventName: string | symbo
 
 type Mapper<T> = (...args: any[]) => T;
 
-export const useEventEmitterState = <T>(emitter: EventEmitter, eventName: string | symbol, fn: Mapper<T>): T => {
+export const useEventEmitterState = <T>(
+    emitter: EventEmitter | undefined,
+    eventName: string | symbol,
+    fn: Mapper<T>,
+): T => {
     const [value, setValue] = useState<T>(fn());
     const handler = useCallback((...args: any[]) => {
         setValue(fn(...args));
diff --git a/src/hooks/useRoomState.ts b/src/hooks/useRoomState.ts
index e778acf8a9..89c94df10b 100644
--- a/src/hooks/useRoomState.ts
+++ b/src/hooks/useRoomState.ts
@@ -25,7 +25,7 @@ const defaultMapper: Mapper<RoomState> = (roomState: RoomState) => roomState;
 
 // Hook to simplify watching Matrix Room state
 export const useRoomState = <T extends any = RoomState>(
-    room: Room,
+    room?: Room,
     mapper: Mapper<T> = defaultMapper as Mapper<T>,
 ): T => {
     const [value, setValue] = useState<T>(room ? mapper(room.currentState) : undefined);
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index b9923f4bc1..90c02aa1b3 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -1598,6 +1598,7 @@
     "Your private messages are normally encrypted, but this room isn't. Usually this is due to an unsupported device or method being used, like email invites.": "Your private messages are normally encrypted, but this room isn't. Usually this is due to an unsupported device or method being used, like email invites.",
     "Enable encryption in settings.": "Enable encryption in settings.",
     "End-to-end encryption isn't enabled": "End-to-end encryption isn't enabled",
+    "Message didn't send. Click for info.": "Message didn't send. Click for info.",
     "Unpin": "Unpin",
     "View message": "View message",
     "%(duration)ss": "%(duration)ss",
diff --git a/src/stores/SpaceStore.tsx b/src/stores/SpaceStore.tsx
index f49d51454b..cd0acc9d88 100644
--- a/src/stores/SpaceStore.tsx
+++ b/src/stores/SpaceStore.tsx
@@ -629,11 +629,18 @@ export class SpaceStoreClass extends AsyncStoreWithClient<IState> {
     };
 
     private onRoom = (room: Room, newMembership?: string, oldMembership?: string) => {
-        const membership = newMembership || room.getMyMembership();
+        const roomMembership = room.getMyMembership();
+        if (!roomMembership) {
+            // room is still being baked in the js-sdk, we'll process it at Room.myMembership instead
+            return;
+        }
+        const membership = newMembership || roomMembership;
 
         if (!room.isSpaceRoom()) {
             // this.onRoomUpdate(room);
-            this.onRoomsUpdate();
+            // this.onRoomsUpdate();
+            // ideally we only need onRoomsUpdate here but it doesn't rebuild parentMap so always adds new rooms to Home
+            this.rebuild();
 
             if (membership === "join") {
                 // the user just joined a room, remove it from the suggested list if it was there
diff --git a/src/stores/notifications/ListNotificationState.ts b/src/stores/notifications/ListNotificationState.ts
index 6c67dbdd08..97ba2bd80b 100644
--- a/src/stores/notifications/ListNotificationState.ts
+++ b/src/stores/notifications/ListNotificationState.ts
@@ -32,7 +32,7 @@ export class ListNotificationState extends NotificationState {
     }
 
     public get symbol(): string {
-        return null; // This notification state doesn't support symbols
+        return this._color === NotificationColor.Unsent ? "!" : null;
     }
 
     public setRooms(rooms: Room[]) {
diff --git a/src/stores/notifications/NotificationColor.ts b/src/stores/notifications/NotificationColor.ts
index b12f2b7c00..fadd5ac67e 100644
--- a/src/stores/notifications/NotificationColor.ts
+++ b/src/stores/notifications/NotificationColor.ts
@@ -21,4 +21,5 @@ export enum NotificationColor {
     Bold, // no badge, show as unread
     Grey, // unread notified messages
     Red,  // unread pings
+    Unsent, // some messages failed to send
 }
diff --git a/src/stores/notifications/RoomNotificationState.ts b/src/stores/notifications/RoomNotificationState.ts
index 3fadbe7d7a..d0479200bd 100644
--- a/src/stores/notifications/RoomNotificationState.ts
+++ b/src/stores/notifications/RoomNotificationState.ts
@@ -24,6 +24,7 @@ import { Room } from "matrix-js-sdk/src/models/room";
 import * as RoomNotifs from '../../RoomNotifs';
 import * as Unread from '../../Unread';
 import { NotificationState } from "./NotificationState";
+import { getUnsentMessages } from "../../components/structures/RoomStatusBar";
 
 export class RoomNotificationState extends NotificationState implements IDestroyable {
     constructor(public readonly room: Room) {
@@ -32,6 +33,7 @@ export class RoomNotificationState extends NotificationState implements IDestroy
         this.room.on("Room.timeline", this.handleRoomEventUpdate);
         this.room.on("Room.redaction", this.handleRoomEventUpdate);
         this.room.on("Room.myMembership", this.handleMembershipUpdate);
+        this.room.on("Room.localEchoUpdated", this.handleLocalEchoUpdated);
         MatrixClientPeg.get().on("Event.decrypted", this.handleRoomEventUpdate);
         MatrixClientPeg.get().on("accountData", this.handleAccountDataUpdate);
         this.updateNotificationState();
@@ -47,12 +49,17 @@ export class RoomNotificationState extends NotificationState implements IDestroy
         this.room.removeListener("Room.timeline", this.handleRoomEventUpdate);
         this.room.removeListener("Room.redaction", this.handleRoomEventUpdate);
         this.room.removeListener("Room.myMembership", this.handleMembershipUpdate);
+        this.room.removeListener("Room.localEchoUpdated", this.handleLocalEchoUpdated);
         if (MatrixClientPeg.get()) {
             MatrixClientPeg.get().removeListener("Event.decrypted", this.handleRoomEventUpdate);
             MatrixClientPeg.get().removeListener("accountData", this.handleAccountDataUpdate);
         }
     }
 
+    private handleLocalEchoUpdated = () => {
+        this.updateNotificationState();
+    };
+
     private handleReadReceipt = (event: MatrixEvent, room: Room) => {
         if (!readReceiptChangeIsFor(event, MatrixClientPeg.get())) return; // not our own - ignore
         if (room.roomId !== this.room.roomId) return; // not for us - ignore
@@ -79,7 +86,12 @@ export class RoomNotificationState extends NotificationState implements IDestroy
     private updateNotificationState() {
         const snapshot = this.snapshot();
 
-        if (RoomNotifs.getRoomNotifsState(this.room.roomId) === RoomNotifs.MUTE) {
+        if (getUnsentMessages(this.room).length > 0) {
+            // When there are unsent messages we show a red `!`
+            this._color = NotificationColor.Unsent;
+            this._symbol = "!";
+            this._count = 1; // not used, technically
+        } else if (RoomNotifs.getRoomNotifsState(this.room.roomId) === RoomNotifs.MUTE) {
             // When muted we suppress all notification states, even if we have context on them.
             this._color = NotificationColor.None;
             this._symbol = null;
diff --git a/src/stores/notifications/SpaceNotificationState.ts b/src/stores/notifications/SpaceNotificationState.ts
index f8eb07251b..137b2ca0f2 100644
--- a/src/stores/notifications/SpaceNotificationState.ts
+++ b/src/stores/notifications/SpaceNotificationState.ts
@@ -31,7 +31,7 @@ export class SpaceNotificationState extends NotificationState {
     }
 
     public get symbol(): string {
-        return null; // This notification state doesn't support symbols
+        return this._color === NotificationColor.Unsent ? "!" : null;
     }
 
     public setRooms(rooms: Room[]) {
@@ -54,7 +54,7 @@ export class SpaceNotificationState extends NotificationState {
     }
 
     public getFirstRoomWithNotifications() {
-        return this.rooms.find((room) => room.getUnreadNotificationCount() > 0).roomId;
+        return Object.values(this.states).find(state => state.color >= this.color)?.room.roomId;
     }
 
     public destroy() {
@@ -83,4 +83,3 @@ export class SpaceNotificationState extends NotificationState {
         this.emitIfUpdated(snapshot);
     }
 }
-
diff --git a/yarn.lock b/yarn.lock
index e0b4a403b8..4f2a6b7242 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5791,9 +5791,10 @@ mathml-tag-names@^2.1.3:
   resolved "https://registry.yarnpkg.com/mathml-tag-names/-/mathml-tag-names-2.1.3.tgz#4ddadd67308e780cf16a47685878ee27b736a0a3"
   integrity sha512-APMBEanjybaPzUrfqU0IMU5I0AswKMH7k8OTLs0vvV4KZpExkTkY87nR/zpbuTPj+gARop7aGUbl11pnDfW6xg==
 
-"matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
-  version "12.4.0"
-  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/2783d162b77d6629c574f35e88bea9ae29765c34"
+matrix-js-sdk@12.5.0:
+  version "12.5.0"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-12.5.0.tgz#3899f9d323c457d15a1fe436a2dfa07ae131cce2"
+  integrity sha512-HnEXoEhqpNp9/W9Ep7ZNZAubFlUssFyVpjgKfMOxxg+dYbBk5NWToHmAPQxlRUgrZ/rIMLVyMJROSCIthDbo2A==
   dependencies:
     "@babel/runtime" "^7.12.5"
     another-json "^0.2.0"