I created a particle with parent and child

the parent have the physic type set to simplecollision
with collide terrain - statics object activated. And bounciness to 5

the child have the second generation - spawn on parent collision activated

In a closed room the particle will do serval bounce, but the child only activate at the first bounce and never again.

Is that normal ? do i miss a particlar setting to have it activate after each bounces ?