neither survivor or killer can go through it,the lenght differ depending on the map
It's always on the right corner of the side with the door with the pallet. Happened two time on shelter wood and groaning storehouse
It happened to me as well.
I opened the Esc menu in the end to let you know which version I was playing on.
No steps to reproduce. Just walk to the check and see the magic.
I only saw happening once. The other matches I played on MacMillan I didn't see any issues.