fix: ensure metaspace changes correctly notify listeners

Author: justjanne

src/stores/spaces/SpaceStore.ts

@@ -1072,13 +1072,19 @@ export class SpaceStoreClass extends AsyncStoreWithClient<IState> {
                 ?.["m.room_versions"]?.["org.matrix.msc3244.room_capabilities"]?.["restricted"];
         });
 
+        const oldMetaSpaces = this._enabledMetaSpaces;
         const enabledMetaSpaces = SettingsStore.getValue("Spaces.enabledMetaSpaces");
         this._enabledMetaSpaces = metaSpaceOrder.filter(k => enabledMetaSpaces[k]);
 
         this._allRoomsInHome = SettingsStore.getValue("Spaces.allRoomsInHome");
         this.sendUserProperties();
 
         this.rebuildSpaceHierarchy(); // trigger an initial update
+        // rebuildSpaceHierarchy will only send an update if the spaces have changed.
+        // If only the meta spaces have changed, we need to send an update ourselves.
+        if (arrayHasDiff(oldMetaSpaces, this._enabledMetaSpaces)) {
+            this.emit(UPDATE_TOP_LEVEL_SPACES, this.spacePanelSpaces, this.enabledMetaSpaces);
+        }
 
         // restore selected state from last session if any and still valid
         const lastSpaceId = window.localStorage.getItem(ACTIVE_SPACE_LS_KEY);