Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “Scenes/SampleScene” Scene
3. Select the “Scenes/PC_RPAsset” Asset in the Project window
4. Set “Anti Aliasing (MSAA)” option under “Quality” to anything other than “Disabled” in the Inspector window
5. Observe the Game View

Expected result: The “Blur” post-processing effect works
Actual result: The “Blur” post-processing effect stops working

Reproducible with: 6000.0.23f1
Not reproducible with: 2021.3.45f1, 2022.3.51f1

Reproducible on: Windows 10
Not reproducible on: macOS 14.6.1 (Intel), Ubuntu 24.04

Note:
- Only reproduces with DirectX11 and DirectX12 Graphics API