Bad renderer order

Hi to all,
I've implemented a Black Hole in this pic:


As you can see, the beam that starts from the north pole oh the black hole is forward respect to the accretion disk (particles), that should be back.
Instead, a portion of this particles are rendered towards the beam. The arrows show that the beam is cut.
It looks like there's an inconsistency in rendering order.
I've created by myself the shader for the beam and the particles, using shadergraph.
Here you can see the 2 materials:

This is the particle system renderer configuration:




thank you in advance

 

no help?

 

I've run into similar issues: https://forum.unity.com/threads/meshes-render-below-everything-else.1008478/

So far, no official response.

 

:-(