As I was building a simple scene, I came across a strange problem.
I’m dropping things into a playing area from a small height and have all the objects using gravity. None of them are trigger colliders but the objects using a mesh collider were dropping through the floor where the box colliders were landing and staying where they should on the ground. I changed the mesh to a small box collider and they fell through again.
Eventually I fixed it by changing the objects to spheres, as the sphere collider also stayed on the playing surface instead of falling through.
Anyone know why this was happening?