diff --git a/src/components/views/elements/TagTile.js b/src/components/views/elements/TagTile.js
index 4ea1b65123..c5fdea0a54 100644
--- a/src/components/views/elements/TagTile.js
+++ b/src/components/views/elements/TagTile.js
@@ -24,6 +24,7 @@ import { isOnlyCtrlOrCmdIgnoreShiftKeyEvent } from '../../../Keyboard';
 import ContextualMenu from '../../structures/ContextualMenu';
 
 import FlairStore from '../../../stores/FlairStore';
+import GroupStore from '../../../stores/GroupStore';
 
 // A class for a child of TagPanel (possibly wrapped in a DNDTagTile) that represents
 // a thing to click on for the user to filter the visible rooms in the RoomList to:
@@ -57,6 +58,8 @@ export default React.createClass({
         if (this.props.tag[0] === '+') {
             FlairStore.addListener('updateGroupProfile', this._onFlairStoreUpdated);
             this._onFlairStoreUpdated();
+            // New rooms or members may have been added to the group, fetch async
+            this._refreshGroup(this.props.tag);
         }
     },
 
@@ -80,6 +83,11 @@ export default React.createClass({
         });
     },
 
+    _refreshGroup(groupId) {
+        GroupStore.refreshGroupRooms(groupId);
+        GroupStore.refreshGroupMembers(groupId);
+    },
+
     onClick: function(e) {
         e.preventDefault();
         e.stopPropagation();
@@ -89,6 +97,10 @@ export default React.createClass({
             ctrlOrCmdKey: isOnlyCtrlOrCmdIgnoreShiftKeyEvent(e),
             shiftKey: e.shiftKey,
         });
+        if (this.props.tag[0] === '+') {
+            // New rooms or members may have been added to the group, fetch async
+            this._refreshGroup(this.props.tag);
+        }
     },
 
     onContextButtonClick: function(e) {
diff --git a/src/stores/GroupStore.js b/src/stores/GroupStore.js
index b0c7f8f19f..e750dc1a6b 100644
--- a/src/stores/GroupStore.js
+++ b/src/stores/GroupStore.js
@@ -233,6 +233,14 @@ class GroupStore extends EventEmitter {
             (this._state[this.STATE_KEY.Summary][groupId] || {}).user.is_privileged : null;
     }
 
+    refreshGroupRooms(groupId) {
+        return this._fetchResource(this.STATE_KEY.GroupRooms, groupId);
+    }
+
+    refreshGroupMembers(groupId) {
+        return this._fetchResource(this.STATE_KEY.GroupMembers, groupId);
+    }
+
     addRoomToGroup(groupId, roomId, isPublic) {
         return MatrixClientPeg.get()
             .addRoomToGroup(groupId, roomId, isPublic)