How to reproduce:
1. Open the attached “IN-97868_DitherBug“ project
2. Open the “DitherBug“ scene
3. Go to Game view
4. Select “Assets/_App/Shaders/Toon Main.shadergraph“ in the Project window
5. In the Toon Main Shader Graph window, toggle the Boolean node to true
6. Save the changes
7. Observe the results in Game view

Expected result: The dithering effect is visible when the Shadow Attenuation is enabled (Boolean node is set to true)
Actual result: The dithering effect is not visible when the Shadow Attenuation is enabled (Boolean node is set to true)

Reproducible with: 2022.1.0a10, 2022.3.60f1, 6000.0.45f1, 6000.1.0b12, 6000.2.0a8

Reproducible on: MacOS 15.3 (M4)
Not reproducible on: Apple M1, Windows 10.

Notes:
- Reproducible in Player
- The users claims the issue isn't reproducible on Intel Mac