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
@@ -1832,7 +1832,10 @@
 
     const newMessageStore = {
       ...updatedMessageStore,
-      messages: actionPayloadMessages,
+      messages: {
+        ...messageStore.messages,
+        ...actionPayloadMessages,
+      },
       threads: threads,
       local: local,
     };