so I’ve used both 4.16 and 4.18 and both have the same issue. Basically the collision still works but portions of the mesh stop responding to line traces. I don’t know how to explain it very well so I took a video. Sometimes the cube with the cross on it stops colliding entirely for no apparent reason, but this happens randomly with no real cause. The procedural mesh seems to lose collision past a certain distance for some reason.
Here is a video of what I’m talking about, the trace hits some of the procedural mesh but not all of it