By default the login dialog has two fields:
In these dialogs it’s a common usage pattern to enter a username, press tab and then enter a password. That’s a common UI/UX pattern. Password managers also use this for auto-typing.
However in one of the last releases a change has been introduced, which adds a password hint field right after the username input field. It’s suddenly required to hit the tab key twice to reach the password field. This is very uncommon from a UI perspective and also breaks the default auto-type behavior of password managers such as Keepass. Sure the latter can be adjusted, but it’s still a major hassle.
Therefore I’d consider this a UX/UI bug.