Steps to repro:
I'm not sure if this is an Android bug, or if 1Password doesn't cancel listening for fingerprint events when the device goes to sleep, so it's eating the fingerprint events that normally would hit the lockscreen.
1Password Version: 6.2b3
Extension Version: Not Provided
OS Version: Nexus 5x 6.0.1 MHC19J
Sync Type: Not Provided