I observe a strange behavior on my Samsung Note 3 while using the fingerprint feature. When I'm presented to enter my fingerprint and I decide not to deal with that at the moment for some reason (will give sample use-cases below), the next time I open the app's activity, I'm no longer presented with fingerprint challenge but asked for my master password. It bugs me that the master password isn't that easy to enter on mobile and this use-case is not rare for me to hit.
Scenario 1 (easy to reproduce): I manually lock the app from the side menu. I'm immediately presented an activity to enter my fingerprint. I obviously want to leave the app and hit "Home" button. This cause the app to fallback to master password authentication the next time I open it.
Scenario 2: When I wonder inside the app. Start creating item, discard it with a back button, the app also presents me with fingerprint screen. If I decide to ignore it and leave, I cause the master password fallback again.
Bottom line - if I don't unlock the app from fingerprint screen, I cause a fallback. And I'm obligated to do that if I don't want to write master password the next time.
Can this be fixed?