Compound collider causing violation of freeze clause

Hi their,

I made an "player" object with a ridigbody attached and two childrens both having a simple collider (and no ridigbody). The ridigbody is limited to y-rotation only. If only one collider is active everything works fine, but when i activate the second one, the player falls over, violating the freeze clauses for x and z rotation. Why is that and how to do make it work correctly?