Yes, I wanted it this way! By this you can keep a server open and wait for players ( or wait for a server in the internet menu ).
And you don't miss someone when you are not in the room or something like this , because the music starts playing again if someone is there.
If one day there are enough servers I will of course revert this, but for the moment its very comfortable in my opinion.
Something thats bad at the moment is the help string that is displayed because people now think its a bug.
Maybe someone has a suggestion for a better text we can show to describe the k-key behaviour?