Running Brave 0.19.139, Mac OS X 10.13.2 w/Supplemental Patch, 1Password 6.8.6
Seeing two problems:
1Password extension does not load when starting up the browser. It only appears if I go into settings and turn the 1Password extension off and then on again. I am running no other password manager extensions (or hardly any extensions at all).
1Password seems to be refusing to fill in any passwords for sites I have logins for. Admittedly, this one is very inconsistent.