GolfBall Physics Collision Problem

Hi !

I’m currently creating a golf game and I have a question . My ball ( Sphere who simulates gravity with a linear and Angular damping) seems to collide with another floor. I mean, if a duplicate a floor at the same Z translate , when my ball moves from the first floor to the second , sometimes my ball collides with the edge of the second floor ( i think ) and its impulse . Anyone know why ?