Stuck in boss room with boss still alive

Stuck in entry wall of Jade isles Deadly map boss. My friend ran in slightly ahead of me and as the wall changed and closed the arena i got stuck in the wall. they managed to clear phase 1 and 2 but died to phase 3. I am not trapped here unable to do anything in the boss room with the boss waiting in the new arena. we were just trying to get a Rakiatas Flow. Character is KuaiLiangRanger

No longer stuck map has been auto failed sick love losing a bunch of resources and the ability to try an d clear this map.