Deleted messages are not removed if app/thread is not open

[SamQuest]

1. Is the bug present in the demo Chat SDK project?
   Yes

2. What modifications have you made to the Chat SDK?
   No Changes

3. iOS Version? Device or simulator?
   Cloned from master. Running in Device

4. Steps taken to reproduce the problem:
   Install chat-sdk-android in a device
   Install chat-sdk-ios in a deivice
   send message from android device to ios device
   open and check message in ios
   close app in ios device
   delete message from android device
   now open app in ios device the deleted message is not removed

5. Expected result:
   deleted messages should not appear

6. Actual result:
   deleted messages appears even after logout and re-logging-in

7. Comments:
   this works in chat-sdk-android as expected.
   also found that deleted images are not removed from firebase storage raised an issue in chat-sdk-firebase Image is not deleted from storage chat-sdk-firebase#2

[SamQuest]

Strangely it works sometimes