I am currently integrating the iOS Messaging Zendesk SDK by initialising the SDK with the channel key and launching the ZDKMessaging.instance.messagingViewController on successful initialisation.
I am running into an issue there - The zendesk chat opens up with previous message history and flows ONLY on the first launch of the zendesk viewcontroller instance.
If I close the zendesk chat, and re-open it, I see the zendesk chat view controller with a no previous messages. I can type the message in the input field at the bottom, however, once I hit send, the message isn't seen in the chat window.
Here is the attached screenshot of how the blank zendesk chat view controller is seen on the second instance.