diff --git a/lib/reducers/message-reducer.js b/lib/reducers/message-reducer.js
--- a/lib/reducers/message-reducer.js
+++ b/lib/reducers/message-reducer.js
@@ -851,13 +851,13 @@
       messageStoreOperations,
     );
 
-    assertMessageStoreMessagesAreEqual(
-      processedMessageStore,
-      filteredMessageStore,
-      action.type,
-    );
-
-    return { messageStoreOperations, messageStore: filteredMessageStore };
+    return {
+      messageStoreOperations,
+      messageStore: {
+        ...filteredMessageStore,
+        messages: processedMessageStore.messages,
+      },
+    };
   } else if (action.type === newThreadActionTypes.success) {
     const messagesResult = mergeUpdatesWithMessageInfos(
       action.payload.newMessageInfos,