Hiding in this spot near the Rot Warren is a bad idea. You instantly sink down into the floor. Recall actually makes you squat, putting you down further. You can no longer move anywhere once stuck. Switching to another group member doesn’t help, nor does Split/Regroup. However, if you go far enough away with another character, you can do Regroup and have the stuck person teleport out. If you save AFTER getting stuck, you will be just as stuck and need to do the above maneuver, or fast travel to another zone.