Devtools: viewdistance setting problems
This can be seen in pretty much any level I think. Open the devtools console, and enter viewdistance x.x
(higher numbers, like 3.0+ create more of a problem, and repeating the command compounds the issue).
This often results in several bizarre physics effects. Sometimes the player and other NPCs/objects are teleported some distance in a certain direction. Other times objects appear to remain stationary, but the level collision bounding is offset, resulting in invisible barriers. Changing levels resets the viewdistance, but as noted above entering the command again compounds the issue as if the previous value had not been reset.
Appears at least on Windows x64 build. Have not tested other builds.