Bitwarden auto-fills username and password but then username disappears

My attempts at logging into always fail.
The username and password fields are auto-filled, but then the username field just disappears and is left blank. If I go back to the Bitwarden pop-up and COPY, then PASTE the username into the username field, it shows fine and I can click the LOGIN button and thins are fine. It appears to be this on this website alone.
I use Windows Pro 10 and Chrome with the Bitwarden extension.

Anyone have some guidance?