diff --git a/lib/pages/chat_list.dart b/lib/pages/chat_list.dart
index 575d2e97..bfdb7d0f 100644
--- a/lib/pages/chat_list.dart
+++ b/lib/pages/chat_list.dart
@@ -51,10 +51,14 @@ class ChatListController extends State<ChatList> {
 
   String _activeSpaceId;
   String get activeSpaceId => _activeSpaceId;
+  final _roomCheckCache = <String, bool>{};
 
   void setActiveSpaceId(BuildContext context, String spaceId) {
     Scaffold.of(context).openEndDrawer();
-    setState(() => _activeSpaceId = spaceId);
+    setState(() {
+      _activeSpaceId = spaceId;
+      _roomCheckCache.clear();
+    });
   }
 
   void editSpace(BuildContext context, String spaceId) async {
@@ -189,26 +193,35 @@ class ChatListController extends State<ChatList> {
   }
 
   bool roomCheck(Room room) {
-    if (room.isSpace && room.membership == Membership.join) return false;
+    if (room.isSpace && room.membership == Membership.join) {
+      return false;
+    }
     if (activeSpaceId != null) {
+      if (_roomCheckCache.containsKey(room.id)) {
+        return _roomCheckCache[room.id];
+      }
+      final retCache = (b) {
+        _roomCheckCache[room.id] = b;
+        return b;
+      };
       final space = Matrix.of(context).client.getRoomById(activeSpaceId);
       if (space.spaceChildren?.any((child) => child.roomId == room.id) ??
           false) {
-        return true;
+        return retCache(true);
       }
       if (room.spaceParents?.any((parent) => parent.roomId == activeSpaceId) ??
           false) {
-        return true;
+        return retCache(true);
       }
       if (room.isDirectChat &&
           room.summary?.mHeroes != null &&
           room.summary.mHeroes.any((userId) {
             final user = space.getState(EventTypes.RoomMember, userId)?.asUser;
-            return user != null && user.membership == Membership.join;
+            return retCache(user != null && user.membership == Membership.join);
           })) {
-        return true;
+        return retCache(true);
       }
-      return false;
+      return retCache(false);
     }
     return true;
   }
@@ -382,6 +395,7 @@ class ChatListController extends State<ChatList> {
           (space.summary?.mJoinedMemberCount ?? 0);
       if (localMembers < actualMembersCount) {
         await space.requestParticipants();
+        _roomCheckCache.clear();
       }
     }
     return true;