I went to the "EasyList" forum and registered at this page.
The URL of the registration is: https://forums.lanik.us/ucp.php?mode=register
1Password filled my Identity and I generated a password.
When I sent the registration form 1Password created an new Login entry.
Now when I go to the forums https://forums.lanik.us/index.php
and click on "Anmelden" to log in, 1Password does not fill my login data.
Also when I click on the 1Password toolbar icon (in my browser) and select the entry "EasyList Forum".
I know where the problem is:
1Password saved the field names of the registration form (the fields are "username", "new_password" and "password_confirm".
At the login form the fields are called "username" and "password".
I wonder why nothing is filled here (the field "username") should be filled at least.
I changed the stored URL in 1Password to https://forums.lanik.us/index.php
but this did also not help.
Now I have different ways what to do.
Create a new entry:
Edit the Field-Names in 1Password:
Create a new entry (for the fields names):
All ways mean a lot of actions.
I have a solution for this mess.
When I go to the login form and copy and paste the login data into the login form (click on the button "Auto-Type" behind username and password) and send the form, then 1Password should ask me if the existing entry should be updated.
If I select "Yes" then the new login fields are added to the existing entry.
1Password Version: 18.104.22.1684
Extension Version: 4.5.9 (Mozilla Firefox)
OS Version: Windows 10 Pro
Sync Type: Not Provided