I have encountered a serious bug, and a related, less serious one.
1. I cannot unlock Enpass 5.6.8 on Android with my master password. I have fingerprint unlock enabled. Sometimes when I've been working with my hands or they are dirty the fingerprint recognition doesn't work. It went into Master Password mode, and despite over a dozen attempts to unlock, it would not. I am absolutely certain of my master password, and even tested it on one of my Macbooks and it worked perfectly. I am syncing with Dropbox. This is repeatable. Launch, hit "cancel" for fingerprint, and then try to unlock with master pw - fail. I tried logging out of Dropbox, then logging back in and trying Enpass - same result.
2. Once in master password unlock mode you cannot revert to fingerprint without force-quitting Enpass.
This must be fixed!