1.) There seem to be issues with collision of some items. There is a typewriter that is a misc object that does not have any collision so it floats in the ari and items pass through it. There are issues with misc items clipping through some surfaces. Some items interact fine.
2.) Strange issue were the player teleports to where they ironsight. Basically I have experienced this about 10 times. Different enemies/ different guns each time. When I go look in iron sights I teleport to where the gun is facing. The distance does not seem to have a cap on it either. I have ported as little a 3 feet in front, and to a maximum of what looked like a a sky view of a monocrome world. the game lagged for a moment then plopped me into what seemed to be an exporable exterior area, no where near where I was. The drop also killed my player character.
Hope this helps!