Microsoft Edge - Problems with login data

I created a web session for my router and a credential entry from Bitwarden linked to that web session. I ran a discovery for the login fields which was successful.

For some reason, running the web session leads to a failed login each time. It's not a credential issue, if I click on the key symbol in the toolbar, the credentials are filled in fine and I can log in.

I tried increasing the "autofill delay" to 1000ms and I removed the check in front "Auto Submit". The latter doesn't have to have any effect, it's always submitted automatically, and fails.

I then changed the browser to Google Chrome, otherwise not changing any settings. This worked right from the start.