I have a set of boxes all tiled together (no gaps, perfectly aligned) all as a flat surface, when i roll my Ball collider over them the ball skips on the joins between the box colliders, is there a way to make it so the ball behaves as expected on a flat surface?
I would suggest having a play around with some of the variables in the physics manager:
my suggestion would be to try increasing the solver count, increasing the bounce threshold or increasing the Min Penetration For Penalty.
Hope that helps