Hi, if I change the number of particles (10000 to 9999) a few on them remain on the renderer named NOODLES. I changed the number, then came here to write this, then looked again, so they won't disappear in reasonable time*. Only solution I found is to hit ParticleSystem Reset pin with a Change downstream ParticleCount. Thought it could be related to some InstanceNoodles nodes.
The other renderer shows how the cycle begins anew, immediately removing all of the particles from the preceding cycle.
So it's possible that is something related to AsAttributeBuffer node. Can't really say it.
*I've waited a few minutes, now, and it's got better, although few parallelepipeds are still there.