How to reproduce:
1. Create and open a new Unity project with HD-RP template
2. Import 'Measured Materials' asset from the Asset Store
3. Load 'AllMaterialsScene' scene (Assets > Measured Materials Library > HDRP STACKLIT > Sample Scene)
4. Select one of the Unity ball gameObjects and re-assign its shader
5. Observe the artifacts next to the ball in the Scene window

Expected result: color artifacts are not visible around the Unity ball
Actual result: color artifacts are visible around the Unity ball

Reproducible with: 2018.4.10f1 (4.0.0, 4.10.0), 2019.2.7f2 (6.9.0, 6.9.1), 2019.3.0b4, 2020.1.0a5 (7.0.1, 7.1.1)
Could not test with: 2017.4.32f1 (HDRP not available)