When healing another character, the patient is ‘dragged’ into alignment with the possibility of the process unhooking them in a wall, or over no walkable area.
(Possibly only reproducible in a confined space.)
Please see video demonstration for further details.
https://www.youtube.com/v/A6mcBujMjAU?version=3&autoplay=1&iv_load_policy=3&vq=default&rel=0