I got DC’d then rejoined during the Fight against the 2 dragons on the flying ship.
I clicked spawn on the waypoint and my character would just fall through the ships floor an fall to its death.
It did this no matter how many times i respawned via that Waypoint on the ship.
It only fixed itself once that fight ended and the waypoint was moved.
Pretty BIG bugg if more then 1 person was to encounter it , the instance would be impossible to complete