diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
index 7452ded2f..13d6b165c 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
@@ -229,7 +229,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
                             }
                         }
 
-                        setupMentionAutocomplete();
+                        getActivity().runOnUiThread(() -> setupMentionAutocomplete());
                         joinRoomWithPassword();
                     }