When trying to kill zombies they become invisable and i am glitched with them continuously hitting me. This has happened two times in the last 30 min. The first time I was stabbing the zombie with a knife, and the second hitting with a sludgehammer. The first time i passed out, and when i came to the zombies were still hitting me, the second time i died but when i returned to the home screen i was still my old character, when i rentered the session I was also still my old character in the same location thank goodness. I then was unable to open or close any doors, so i logged off.