Why does my locked phone constantly vibrate?

[Android Central Question]

This problem occurred immediately after the last O/s update. Android 8.0.0, Kernel version 3.18.71.

Randomly vibrates, and when I lock it, it constantly vibrates.

I noticed it was the same vibration as when I unlock with my fingerprint.

I turned off the option to use a fingerprint to unlock the phone, and the problem goes away.

Tried a factory reset, still a problem. Any ideas?

 

[B. Diddy]

Welcome to Android Central! Which phone? Was it an official system update pushed over the air? Does this also happen in Safe Mode?