MFA auto-fill does not work for Unifi

Hi,

For a very long time I am using 1Password in combination with my Unifi (ui.com) account.

This SSO account is used for my local devices as well as for the Unifi portal.

It is secured with a MFA / OTP.

Whenever I am logging on with a browser, the auto-fill for username+password works as expected.

Also the OTP is filled in but it is not accepted.

When I copy+paste the OTP, it's accepted.

I have added a new OTP in 1Password (as suggested by 1P AI Chatbot) but this does not help, the issue still remains.

Tested browsers: https://brave.com/latest/Safari Version 26.5 (21624.2.5.11.4)

My issue: I don't know why 1P Extension auto-fill works but uses an invalid OTP