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
@@ -1467,15 +1467,12 @@
       messageStoreOperations,
     );
 
-    assertMessageStoreMessagesAreEqual(
-      processedMessageStore,
-      messageStoreAfterReassignment,
-      action.type,
-    );
-
     return {
       messageStoreOperations,
-      messageStore: messageStoreAfterReassignment,
+      messageStore: {
+        ...messageStoreAfterReassignment,
+        messages: processedMessageStore.messages,
+      },
     };
   } else if (action.type === setMessageStoreMessages) {
     return {