Community ManagerHi @ObiwanKinobi, thanks for your question.
With Auto-Lock on Exit set to anything other than immediately 1Password will lock after the interval ends, if locked directly, if removed from recents and if the device restarts. If these scenarios aren't happening and 1Password hasn't been inadvertently closed, battery optimization on the device may be causing 1Password to lock or this may be the result of a bug we've recently identified where having multiple apps open can essentially push 1Password out of recents locking the app. Do you typically keep numerous apps open in your recents?
To use face unlock, 1Password requires devices to use Google's native Biometric framework as well as use strong encryption. On the majority of Android devices, face unlock is considered a "weak" biometric factor. This is due in part to the fact that most Android devices do not have IR or depth sensing cameras to scan facial biometry. Without that, a photo or video could trick Biometric unlock. To clarify, many devices have a facial scanner, but may not support Google's native Biometric framework as well as support strong encryption. Currently, a very limited number of Android devices have this support.
ref: dev/core/core#18114
