Found the exact issue I believe studio is doing.
So I was doing some tests, and for said tests I made the bounding block, and slightly made it out of the bounding box of the normal shoulder. And then made it a proportion normal box.
Somehow, somewhere in studios spaghetti code. It is making the proportion normal into the other smaller bounding box for. Whatever reason I have no idea, unless there is something I’m missing here we are likely gonna have to wait for the next studio update.