Is the collision different in Html5?

Hey,
i added a gif to this question where i tried to put a small plate on a bigger plate. As you can see the small plate goes through the big plate and the otherway around. I could not reproduce this behaviour in the engine so i would assume that the html5 version has a different handling of collision. Is there something i need to keep in mind when i want to place the small one on the big one. This bug only appears when i try to put the focus the center of the plate and try to put it there.

212707-2017-09-08-00h18-03.gif

Your question mentions UE 4.16. Can you try with WebAssembly in UE 4.17? Collision handling should be the same, and there is a chance that WebAssembly improves the arithmetic related to that. (UE 4.16 was only able to do asm.js exports iirc)