Steps to reproduce:
1. Open the attached user's project "BC7_Alpha.zip"
2. Open "Assets/Scenes/SampleScene.unity" and enter Play Mode
3. Capture a screenshot of the Game View
4. Open any image editing software (e.g Gimp)
5. Increase the contrast until you can observe the artifacts (see attached "actual results.png")

Actual results: Parts of the high contrast background image are visible through the opaque blue texture
Expected result: Blue texture is fully opaque

Reproducible with: 6000.0.70f1, 6000.3.10f1, 6000.4.0b11, 6000.5.0a8
Could not test on 2021.2.0a3 due to a crash that is unresolvable (it was fixed with 2021.2.0a4 release)

Environment tested: Windows 10 24H2