*Steps to reproduce:*

1. Open an HDRP project

2. Import the provided Unity package

3. Open the scene named _VFXG_Spawnindex_instancing_Issue_Scene_

*Actual results:* 
You can notice two groups of VFX instances, one of them is using Instancing , the other has the feature turned off. On the Group with the instancing turned on, the Color of particles that should go from 0-1 for each instance isn't correct. 

!image-2024-06-28-11-28-34-642.png!

*Expected results:* 

All particles in lines should have their colors between 0-1 like the result that can be seen on the VFX instances with the Instancing feature turn off.

*Reproducible with versions:* 
6000.0.5f1, 6000.0.7f1, 6000.0.9f1
*