During the 1st Boss fight with the two ogres, the 'icy tremor' mechanic seems to be affected 2-3 people at the same instant and also kills players in a way that is instant (as in, you're just killed by icy tremor, there's no AoE following you as usual). Please post a comment whether you have experienced this, or please queue for the dungeon yourself and report back here. I've completed the dungeon many times and the icy tremor I remember happening one at a time, not multiple players at ones and it does appear to be killing players randomly instantaneously as mentioned.
Thank you