diff --git a/res/css/structures/_LeftPanel.scss b/res/css/structures/_LeftPanel.scss
index 5603de18d8..da17e5f1f9 100644
--- a/res/css/structures/_LeftPanel.scss
+++ b/res/css/structures/_LeftPanel.scss
@@ -50,6 +50,7 @@ $roomListCollapsedWidth: 68px;
     contain: content;
     position: relative;
     flex-grow: 1;
+    overflow: hidden;
 
     // Note: The 'room list' in this context is actually everything that isn't the tag
     // panel, such as the menu options, breadcrumbs, filtering, etc
diff --git a/src/resizer/resizer.ts b/src/resizer/resizer.ts
index 92f458e7c7..19af425b8b 100644
--- a/src/resizer/resizer.ts
+++ b/src/resizer/resizer.ts
@@ -78,7 +78,7 @@ export default class Resizer<C extends IConfig = IConfig> {
     }
 
     public attach() {
-        const attachment = this?.config?.handler.parentElement ?? this.container;
+        const attachment = this?.config?.handler?.parentElement ?? this.container;
         attachment.addEventListener("mousedown", this.onMouseDown, false);
         window.addEventListener("resize", this.onResize);
     }