I disabled the lock screen for Password AutoFill in "Settings - Advanced - Security". My Master Password must be entered every 30 days. In the meantime I only have to use my PIN-Code. This works well for opening the app and for Password AutoFill.
But after updating to the latest version every time I have to enter the Master Password for opening the app and for Password AutoFill.
I remember the last updates of the iOS version of 1Password. Every time I have to go to "Settings - Advanced - Security" enable the Password AutoFill setting and disable it again. Then it works and my PIN-Code is needed for opening the app and Password AutoFill. Otherwise I have to use my Master Password which isn't short to login to the app or Password AutoFill.
May be you can reproduce this behavior and can build a fix for that?
1Password Version: 7.3.2
Extension Version: Not Provided
OS Version: iOS 12.3.1
Sync Type: Not Provided