Backup and or restore doesn't work at all
Miui 11 android 10 this is fdroid, but it was the problem on GP too
A long time ago i reported an issue that convinced me i have made a mistake or typo in password entering. https://git.jami.net/savoirfairelinux/ring-client-android/issues/836
Reproduced it with backuping on jami app with success
making an app clone or jami-2
entering backup from file with right password
it lies that that account doesn't exist, even if that account is online and if offline
the reason i didn't try to believe device wasn't compromised or that i didn't make a typo is that i would never think that a gnu stabile project could have this kind of bug. But i gave it a chance multiple times, and i guess its closely connected with jami-android-backup-button as i remember, i may be wrong