I encountered the Issue on Steam/PC
I was playing with friends
I was playing as Bruenor Battlehammer

Problem: During combat my friend was playing as Drizzt and was immobile after being revived. He could not move, use abilities, or items. I managed to have him lowered to zero hp but he was still standing and was not able to be revived nor could he respawn. This was on the Halls of Dreuner (Sorry if misspelled) mission.

Feedback: My main critique is the way you join matches and that you can't join mid-game. So if my friend gets stuck, which he did, he can't leave and then rejoin. The lobby system cold be refined a bit more for easier in and out transitions.