It appears there is a bug when falling/walking/etc, when you walk into a wall, it automatically causes you to go to the top of the object. It's a weird bug, but what's even weirder...
Is the reason it comes around! I had trouble figuring out why my old .cap was causing this to happen, so I looked at each object individually and I found out that the TextToSpeech object seems to cause this bug!
Here is a .cap upload of the bug.