I was doing a GitM today, and I tried to cloak in the left party room on the second depth. Unfortunately, the suicide bombing zombies still spawn when you reach the top half of the room, even if cloaked, and I died. On my screen, I used a Spark of Life and my character was back to normal, fully functional; however, my party members saw my character as if it was still cloaked, the phantom-knight. It was purely a graphical bug, and using the cloak again, allowing it to wear off as normal, fixed the bug.