1Password on Windows in Firefox always redirects to the first URL stored in a password entry - if the URL has no dot in its server name.
For example, I have two NAS systems running on https://nas1:5001/ and https://nas2:5001/. Both have the same admin credentials so I store both in a single entry in 1Password - with both URLs provided.
Now, when I'm in Firefox, navigate to https://nas2:5001/ and hit the "Fill Login" key combo (or use the 1Password icon in Firefox' toolbar), 1Password always redirects the page to https://nas1:5001/. So, I can't use 1Password to fill the password for the second NAS.
It doesn't happen for URLs that contain a dot (like https://google.com) and it also doesn't happen on macOS & Firefox, or in Chrome on Windows.
However, for some pages it's even redirecting when the URL already is correct - and then for some pages 1Password fails to fill the login altogether, so I have to manually fill it. As you can imagine, this is quite annoying.
I'm currently running Firefox 66.0.5 but I have observed this strange redirect behavior for quite some time (but it didn't occur to me until today that it could be related to URLs without dot).
1Password Version: 7.3.684
Extension Version: 126.96.36.199
OS Version: Windows 10 x64
Sync Type: Dropbox