Ultimatum last door bug

Did Exalted Inscribed Ultimatum, went through 10/10 rooms, killed boss and the door that leads to rewards does not open. Quest tracker says "Enter the challenge area". After walking around I noticed that Trial Master was not triggered which he always does after entering every room in ultimatum. The last boss was annoying flying chimera and I just blinked into low ground without triggering Trial Master, so it might have something to do with the bug. Sorry for the long post, but wanted to give as much information as possible.

Second time when i can't close reopen Temple of chaos...