Historically there has been a bug that has popped up many times that will give you a disco when you leave one arena and go to another one. For years I would alt F4 on leaving if I wanted to go someplace else. Because it was faster than taking the chance that I might dump me.
Now I "thought" HT had that sucker nailed down and killed, but that is what it sounds like is happening to you.
Easiest way around it is to just close the game completely before changing arena's.
