Scene flickers when using Mesh Output with SpriteLit Shader in 2D project

Steps to reproduce:

1. Import the attached package to 2D project
2. Open Sample scene

Actual results: The whole scene flickers due to the Mesh output using the SpriteLit shader

Expected results: Even though it is an unsupported workflow, error cases should be handled gracefully, for example, as with other unsupported cases, the VFX Mesh output should not compile and user-friendly error messages should be shown

Reproducible with versions: 22.3, 6.1, 6.2, 6.3

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): macOS

Notes:

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