Passive collider deforms when interacting with another collision layer


I have two sets of nParticles, one on top of a plane (the passive collider) and another beneath the plane with a goal animated so that it passes through, the animated ones are on a different collision layer so they don’t get stuck beneath the plane

Well, apparently the particles deform the collision box of the passive collider when passing through, and i don’t know why this happens

anyone have any ideas on how to work around this? Maybe i’m not approaching this correctly? i need the first set of particles to rest on a rigid and another set animated so that it “emerges” from them