Let me explain the issue.
I think it asks my master password on some cases; restart etc. That's okay. Let's assume that I restarted the phone and try to fill in a form. It asks my master password, I type in it and it shows the login items. (Btw, on that case if I go to details of the login item, copy/reveal/show in large type options are not available when I click the username or password. I think it is another bug.)
If I click the login item, sometimes it fails. Therefore, I click the password button on top of the keyboard and 1Password asks my master password again. If I do that again, it will ask it again, even I open the main 1Password app.
I recorded a video to show the problem, but I can not share it because my password is shown when I am typing.
Can you please guide me if I am missing some settings or something else? If this is a bug I can try to provide more information.
Lock on exit: disabled
Auto-lock: 1 hour
1Password Version: 7.3
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided