It may be too late for me... but I'm here to warn others using the biometric option to unlock.
The phone started not recognizing my fingerprint, so I 're-taught' it. When I went to use Enpass, it tells me that I need to enter the master password to open it, since the fingerprint was 'tampered' with. Makes sense... If you are smart enough to recall your master password! If you're not, you'll be locked out. Having Enpass warm me of this before 'changing' the fingerprint would have been a life saver. As of now, I'm replying to a lot of 'So you've forgotten your password!?' emails.
So many passwords are now kept from me. Don't make the same mistake I have, unless you enjoy relying to those emails!
(very sad face emoji)