No Login window if moderator present

we just updated to the latest stable version of jitsi-meet on a ubuntu 20.04 system. before the upgrade we could have multiple moderators login with the setting → Log in button. but with the new version dialogue for user and password does not come up.

Can anyone confirm this issue?

Yep, this is known and is fixed in latest versions. And is fixed in the RC for the new stable release (which should happen pretty soon) and is currently in testing repo, you can update from there.