Steps to reproduce:
Open the attached project and view the scene in-editor.
The issue should occur in-editor and in-player. If in-editor you can select the particle system object to see the issue occur in the scene view.
To reproduce manually:
1. Create a scene with a particle system, using the built-in renderer.
2. Set the system to use the Mesh render mode and configure a mesh.
3. Toggle "Enable Mesh GPU Instancing" on from the Renderer group.
4. Create a basic particle shader based upon a built-in version, and remove the
"IgnoreProjector"="True" tag so that projectors can affect it. Add this to a material and set it on the particle system's renderer.
5. Add a projector to the world and give it a projector material.
Actual results:
The particle system will render in editor and players with a visible static particle (or stack of particles) at the world origin.
Expected results:
There should be no orphaned particle(s) at the origin.
Reproducible with versions:
2021.3.17f1, 2022.3.17f1, 2023.2.10f1