MM iOS Client Freezes At Start

Summary of issue:

Repro steps:

  1. Login to iOS app and close.
  2. Restart Mattermost server when deploying an upgrade or doing server maintenance.
  3. Open iOS app.

Observed: iOS app is frozen and buttons (e.g. menu and settings) don’t work. Need to reinstall app to make it work. There are no logs.

Server: linux 64b
iOS client: latest firmware v11.4.1
MM App v1.10