1Password Safari Extension Fingerprint Unlock Not Working!

To echo SyberCorp, I found the same solution. I followed the instructions I got from support with no resolution, but uninstalling 1Password for Safari and reinstalling it fixed the issue.

Something definitely gets out of sync, but that's above my pay grade to understand or figure out.

Now, I would be remiss if I didn't mention that there is still a noteable lag (5 seconds or more) from when the fingerprint is accepted and the little icon in the username field shows that 1P is unlocked, and then offers my login details. But that seems to have been a persistent lag for a while now (and is probably talked about in another thread, so I guess forget I mention it here).