After the update to 1Password X v1.19.0 (and macOS 7.5.BETA-0) the desktop integration stopped working.
I use Brave primarily, but the same thing happens in Chrome. The odd thing is that one browser profile works, but the others don't.
When I click on the 1Password icon in the browser toolbar, it comes up with a dialog saying "Your account hasn't yet been added to 1Password for Mac" and there is a blue "Manage Accounts" button.
The account is certainly there, the desktop app is working fine, and as I said that one browser profile works, while the others don't.
All browser profiles in Chrome and Brave are running v1.19.0.
1Password Version: 7.5.BETA-0
Extension Version: 1.19.0
OS Version: macOS 10.15.4
Sync Type: 1Password