I have not seen this working at all in version 7.*
I open iTunes and choose signin, iTunes dialog appears asking for name and password.
I click in the password field.
I open 1Password mini, and attempt to have it auto fill the password field ... I have no idea where it goes but it never goes into the password field. I have similar problems with other apps too. (this used to work with version 4 or 5)
1Password Version: 7.1.566
Extension Version: Not Provided
OS Version: Windows 10 (latest)
Sync Type: Not Provided