[Lava]

It is indeed a strange thing, and I don't think that you are 1 in 1 000 000 players that this could happen to, because if it needs to be that exact spot that a character uses to open the container, then it's 1x1 pixel point on the area. I will keep the script here, but I would still advise summoning the dead knight with a console (file name: L#RVKNI)

Thanks for sharing the info on the engine glitch.