Mesh Collider Faulters at positions xyz

Hi there,
I made a shape in ProBuilder, and the resulting Mesh Collider is inaccurate at this juncture in picture. Meaning a RayCast.Down which my player sends correctly for most of the track returns null at the point. I am wondering what might be happening and how I can fix this.

Thanks!

 

Is this mesh marked convex on the MeshCollider componant? If so, the MeshCollider will approximate the mesh data by reducing the collider's complexity, which reduces the total vertice count on the collider and gives it volume. With this reduction, especially for complex shapes like this one, it can change the collider's shape entirely.

 

Hi,
Convex = false, on the component.