Mesh Particles flicker when GPU Instancing active (Unity's standard Particles Shader)

Hello Community,
am having a strange problem on Windows and with any Unity version (tried 2021+ as well as the newest beta).
Particles flicker heavily as one can see in this video:

https://www.dropbox.com/s/r1dvxe6768byra0/ParticleMeshOclusion - SampleScene - Windows, Mac, Linux - Unity 2021.2.0b3.3078.7 Personal_ _DX11_ 2022-03-04 03-01-45.mp4?dl=0


If I disable GPU instancing: No flickering. Enabling GPU instancing: Flickering.
It only happens when there is more than one type of particles visible and once there is a substantial amount of them.

Am using the normal particles shader there on the built-in rendering pipeline. The regular standard mesh shader does not have this problem but it does not utilize the color channel how I need it.

What I have tried so far to change without any improvement:
- Pressing the "Apply to Systems" button for the "Required Vertex Streams" sections of the materials.
- Particles sorting modes
- Particles render alignment
- Camera- as well as particle- positions and rotations
- Changing camera Rendering path (Forward\Deferred)

Anybody have an idea?
Huge thanks!

 

Ah very interesting.
Sorta coincidentally (I merged my work into a briefly older project where I want to use it and the issue disappeared), I have been able to narrow down the Unity version way further!

It happens in:
2021.2.0b3
But NOT in:
2021.1.2f1

Hope that helps to fix it

 

Yay, can confirm, 2022.1.0b13 fixed the problem thanks to ticket: https://issuetracker.unity3d.com/issues/particles-are-flickering-when-in-play-mode

Thank you, @richardkettlewell and others of the Unity team!