How to reproduce:
1. Open the attached project
2. Open scene Scenes/SampleScene
3. In the Hierarchy, double-click the GameObject "Quad"
4. Position the Scene view Camera so that the Quad is observed with the Sphere behind the Quad
5. In the Hierarchy, select the GameObject "Sphere"
6. Move the Sphere slightly towards the Scene view Camera while observing the Scene view and the Game view

Expected result: the rainbow colors of the Quad indicate the position of the Sphere behind it, while also changing according to depth
Actual result: the Quad is a single solid color that does not reflect the position of the Sphere behind it

Reproducible with: 7.7.1 (2019.4.33f1), 10.7.0 (2020.3.24f1), 12.1.0 (2021.2.1f1), 13.1.0 (2022.1.0a15)
Not reproducible with: 12.1.1 (2021.2.2f1), 12.1.2 (2021.2.5f1)