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
@@ -731,13 +731,10 @@
       messageStoreOperations,
     );
 
-    assertMessageStoreMessagesAreEqual(
-      processedMessageStore,
-      freshStore,
-      action.type,
-    );
-
-    return { messageStoreOperations, messageStore: freshStore };
+    return {
+      messageStoreOperations,
+      messageStore: { ...freshStore, messages: processedMessageStore.messages },
+    };
   } else if (action.type === incrementalStateSyncActionType) {
     if (
       action.payload.messagesResult.rawMessageInfos.length === 0 &&