Demon Form crashes the game in (4thfloor) Trials!!

Ok, very simple. Time plate (teleport back to thingie), step on it with demon form, 100% of the time get an error code + crash that states demon form error or something. Walking on said plate out of form does not crash the game.

The same error and crash happens on the boss himself, Zarokh at around 30% hp (could be random). Please I can't ascend because I have no damage out of form.

This bug is bricking me from beating trials.