I fall through the ground
It’s not just that area, it’s happening all over. Let me know if you want a repro.
Make sure to stick your thread in the “Client Bugs” subcategory rather than the top-level bugs category.
http://devforum.roblox.com/t/every-bug-should-be-in-a-sub-category/22639
Although I’m sure this is one of the known issues, you should look if any staff member posted about it before.
My bad, I must of forgot. This only happens in studio btw if that matters.