continually getting 72 Hr pin request

[Jim Prong]

I have fingerprint unlock on my Moto G4 Plus. The phone locks several time a day, and requests a pin number because on hasn't been entered for 72 hours, even though I may have had to enter it only minutes before.

Any clues as to whats causing this?

Cheers
Pete

 

[B. Diddy]

Does it seem to be related to unsuccessful fingerprint unlocks?