it looks like when you enter an instance when in combat, there is a posibility to trigger a bug
sometimes (its not actively reproducable) when you enter an instance (It happened to me (Greenlab) in DM and now to our healer (GlanFathel) in stockades) when in combat, you will never leave combat until you die
I tried:
- leave the group
- leave the group, quit the game (ALT-F4 way)
- /reload
- leave the instance and do a /script ResetInstance{}
but nothing worked.... you only leave combat when you die