High speed collisions

Hey! I'm creating a mini golf game and when the ball goes up this hill (created in ProBuilder) it randomly bounces off the dark middle-area as if hitting a sharp edge in the opposite direction, about 1 in 10 times.

I've seen many similar treads about the inaccuracy of the physics engine and wonder if this might ever get fixed?

I've tried all collision types + most of the physics settings + time stepping.

The only solution working for me right now is putting a trigger there which redirects velocity in that direction.

/T