Menu Music never stops (unless you restart the client)

I queued up for twisted treeline, and that "ominous" background music with the white noise/ambient background sounds kept playing throughout, even during the game. I tried playing with all the sound dials, and it was definitely the "Menu" not the game itself.

After the game, the music continued, regardless of which screen I was in.

After restarting the client, it stopped, and the respective menus played their correct sounds again.