I'm posting this on both 1Password and Craft issues as I'm not sure what's changed where; but I think there's a lot of developers who use both these tools so hopefully affects more than just me.
A few days ago, on the Craft CMS login screen (on my development sites) The "Forgot your password" text started appearing over the top of the 1P auto-fill window. I ignored it, but I've just found a more serious one inside the control panel. When you're prompted for a password within the control panel, like when you update user permissions, or get signed out of the CMS, the 1PasswordX autofill window appears behind the overlay underneath everything else so it's not possible to use it.
Craft Issue: https://github.com/craftcms/cms/issues/5448
The suggestions box is behind the popup, and behind the dark overlay
"Forgot your password?" is in front of the auto-fill box
The auto-fill box is behind the modal, and behind the overlay
1Password Version: 7.4.2-BETA-2
Extension Version: 1.18.2 (beta)
OS Version: 10.14.6
Sync Type: my.1password.com