The following scene should be simple.
A sphere on a (CSG) plane.
The sphere is applied with a force in z-direction.
The sphere should but does not follow a straight line.
Please start it a few times. The sphere always uses a slightly different route and never a straight route.
If you change the if-clause to false then no CSG is used and in that case the sphere takes a straight route.
How to achieve the same with a CSG?