Hey, so I just recently found this problem. I am not sure exactly what the problem could be. In studios I have tried to select the object, I have also made use it was not locked and from what I see, nothing is there in studios.
Whatever this is, it seems to go for quite a while. It acts as a wall if you approach from the side but when you get on top, it makes the avatar do the fall animation and starts to move the avatar around. Not sure if anyone knows what this might be, any help is greatly appreciated.