Authorization key is forgotten while still valid

[Lonami]

As seen in https://t.me/TelethonChat/207545:

lonami would enabling debug logging help with the Auth key issue ? not sure we'd get enough info from that i don't even know what i should be looking for to debug that tbh If you have any idea just ping me :D i wonder what would happen if you made a backup, the session broke and then tried to use the backup if it works perhaps it means we can ignore the error what was the name of the error again? I don't need to remove the session btw unless telethon does that automatically I just need to login again yeah i think telethon discards the authkey when the error happens which is why i suggested the backup hmm so backup a working session, then wait till it breaks, and then use the backup session again ? or make a new session after the backup will do (not renaming the backup or using the backup directly, but copying the backup to replace the old "broken" session)

As seen in https://t.me/TelethonChat/210902:

@lonami great news, I did the session copying thing when I got ConnectionError: auth_key generation failed 5 time(s) again and it worked so telethon is tossing the authkey when it shouldn't seems like it it's always the same request huh Always GetFullUserRequest, odd

[Lonami]

This might be best addressed by something like https://github.com/LonamiWebs/Telethon/commit/fdb0720fe941bbcad48913a0dfe2b4fb66eaf7ef.