I found a possible bug in 1Password on macOS. For logins which support 2 factor authentication there is a banner on top notifying you that it's available. If you dismiss it by pressing "Don't save in 1Password" it creates and adds the tag "2FA" to the login. I don't like that 1Password is messing with my tags because I actually use this very tag already to manually tag my logins. Having 1Password using tags interferes with my use.
1Password Version: 7.4.1
Extension Version: Not Provided
OS Version: macOS 10.15.1
Sync Type: 1Password Account