Ignore Pawn collider in Niagara Mesh Renderer

Hi,
I have this issue, that I am emitting in Niagara via Mesh Renderer “rocks” … they immedeatly collide with the player collider… (I would need the rocks to ignore pawns)

I have set the mesh collider of the rocks to ignore pawns, however they still collide with the player mesh.

What am I missing here ? Are this settings in niagara ? or on the mesh, I have to change ?
set to Ray Trace and world dynamics on the Collision “tab” in the emitter

hope someone can guide me in the right direction ?

image

settings from the rock mesh collider:
I also tried “World Static” … both are not working