ZCC in Authentication/Registering constant loop


One of the users that received ZCC (ZAPP) is constantly in loop and have issues. This is second time i see this problem and its not disappearing as first one.
User received APP normally thru our deployment cycle and it’s stuck/blocked due to this behavior, app is constantly crashing again and again, first it identifies the user, authenticate, register device, download the config, and then it crashes and start everything again.

Has anyone faced this issue before, and is there any solution for this? Version of APP is 2.1.2 i want to upgrade it automatically but its not possible. Next is to make manual upgrade to 3.1 and see if that helps…

Edit: 3.1 version seems to fixed this issue, but am still curious if anyone has experienced same issue?