Autofill not working on login.microsoftonline.com after getting signed out due to idle

https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize
After being signed out do to idle time, you get redirected to that URL. Kee see’s the password field, but won’t fill it in. (using Firefox with latest version of Kee.pm addon)

It ONLY doesn’t work after being signed out via the timeout. It works for the initial sign-in.