Early access Trial of Sekhemas couch coop

Playing there the 3rd ascendancy couch coop, after multiple attempts no matter the route when we got to the trail of will boss ( Ihadti of the Flaming River and Rafik of the Frozen Spring) that player 2 could get 1 tapped by any skill from the boss and end the trial, no health gone no honor lost just the trials have screen. At first we thought player 2 was to far out of range as they were hugging the outside wall by the entrance door. On attempt 2 we made sure to stick close to the boss but getting hit by a small boss skill instant killed player 2 again. 3rd times the charm ? same result again. lost 3 coins and all relics.

If anyone has any feedback as to why this seems to be breaking our game ? would like to progress together.

Thanks !