I'd like to add, if I may:
Last boss of Aeternal Circle (at least on normal) glitches and the door barrier stays up, even after party wipes/boss has reset, preventing from any further attempts. We tried everyone dying, everyone rezzing out and running back in, no dice. Only way to fight him once that happens is for the whole instance itself to reset.
Ravesden, D/S/Wd 80/75/62
Retired. Click siggy for old RoM vids, among other things.