The website https://secure.informer.eu/ asks for a Security code, besides a Username and Password. After supplying all three values correctly a fourth input box appears where you need to enter your 2FA code.
1PasswordX automatically fills the Username and Password correctly. However, it fills the 2FA code into the Security code field. I have to copy the Security code from my account in 1PasswordX and paste it into the field. Then hit enter to reveal the 2FA field, which is not filled automatically, so I have to copy-paste the 2FA code then as well.
It has worked nicely in the past. I think with the 'old' 1Password plugin (for Firefox).
1Password Version: 7.5.BETA-1 (70500001)
Extension Version: 1.20.0
OS Version: OS X 10.15.4
Sync Type: Not Provided