Fingerprint Lock Lock Icon Appears

I have fingerprint lock setup and us regularly. Periodically I'll get this lock icon (shown in the picture) that I have to swipe before I can use my fingerprint to unlock.

No idea how this was setup or what's going on. I've turned swipe on and off, rebooted, wiped cache, but still happening.

Anybody seen this before and if so how did you get rid of it?



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Model number that appears in Download Mode or In Settings>About?

Hello. I'm using Samsung galaxy S5 and want to upgrade it manually. In the Settings>About, the model number appears to be SM-G900F, but when i set the phone into Download Mode, it shows SM-G900P. So, which firmware exactly do i have to load on the phone? that of SM-G900F or that of SM-G900P?