Do not use andOTP
App is buggy and it deletes all the codes
it was such a pain to recover all the codes and go back to Google Authy. There is saying if it isn't broken then don't fix it. Use titanium and back it up.
I have been using andOTP for over 5 months and never had any issue or heard about it. How about you create an issue in their github repo instead of posting something vague like that?
Still, your codes won't get deleted and lost if you backup them. That's the whole point of using a different 2FA app like andOTP. Enable and backup. Easy right?