If mobile was offline when person was exiting any group, then the device should be doing sync to let server know about this change when Internet is back next time.
Tested this use case on wats app. Watsapp donot restricts user to exit group if he/she is not connected to internet.
I followed same logic and implemented same on KiboChat.
This has been done.
If mobile was offline when person was exiting any group, then the device should be doing sync to let server know about this change when Internet is back next time.