This is why bug fixes exist.
An increasing number of reports have surfaced stating that iPhones running iOS 9.1 are experiencing Touch ID problems wherein Touch ID has become slow or unreliable.
The complaints are similar: users running iOS 9.1 find Touch ID either refuses to recognise a user’s fingerprint, has become highly unreliable or doesn’t even register a fingerprint pressed against it. Users have tried hard resets (holding in the power and home button for 10 seconds) and complete factory resets without any success.
The issue appears to be affecting a small number of users, but harkens back to issues with Apple’s iOS 8.0.1 update last year in which Apple was forced to pull and repair the update after reports of problems with both Touch ID and cellular connectivity.
In other cases, users have been asked to enter their passcodes to unlock their iPhones literally every 48 hours. Apple’s support page says that a passcode unlock is a requirement when the phone hasn’t been unlocked at all for more than 48 hours, but iOS 9.1 seems to have introduced a bug for some where Touch ID unlocks are not being counted.
If you’ve seen this issue on your end, let us know in the comments.