Reproduction steps:
1. Open the attached "IN-128407_PROJECT.zip" project
2. Open the “Assets/URPMobileGrassInstancedIndirectDemo/InstancedIndirectGrass/TestScene/scene.unity”
3. Enter Play mode
4. In the Scene view, observe the grass trampling behavior
5. Observe the Game view
Actual result: Game view is missing grass trampling behavior
Expected result: Game view has grass trampling behavior
Reproducible with: 6000.0.6f1, 6000.0.69f1, 6000.3.10f1, 6000.4.0b11, 6000.5.0a7
Not reproducible with: 6000.0.5f1
Reproduced on: macOS 26.1 (reporter), Windows 11
Not reproducible on: No other environments tested
Note: Didn't manage to test this issue in Player (build blocked by package asset import errors)