Split brep with brep

Hi all,

I have a small problem with splitting brep.
I have a sticks like on the attached image and I am trying to split them with a shape also imported as brep.
but for some reason it doesn’t fully work and I’m not sure what I’m doing wrong.

Thanks!

It is nos easy to answer without file! Surely a problem with core rhino function that fails on that. Did you try to bake and do it in Rhino ?
Change tolerances and recompute (there is a menu to do that in GH) it sometimes help.