Reproduction steps:
1. Open the attached ‘EnvSampling' project
2. Go to the ‘Project Settings → Quality → HDRP → Post Processing’
3. Set the Buffer Format to ‘R16G16B16A16’
4. Open the ‘OutdoorsScene’ and observe the ‘Sky and Fog Volume’ GameObject

Expected result: The Contrast Volume is applied to the ‘Sky and Fog Volume’ GameObject
Actual result: The Contrast Volume is not applied to the HDRi Sky, the ‘Sky and Fog Volume’ GameObject color is not adjusted

Reproducible with: 2023.1.0a5
Could not test with: 2020.3.38f1, 2021.3.8f1, 2022.1.12f1, 2022.2.0b2 (multiple shader errors after downdrading)

Reproduced on: Windows 11 (Nvidia)
Not reproduced on: MacOS 11.6 (Intel)

Notes:
- The issue is not reproducible when the path tracing is not set up
- The issue is not reproducible when the Command Buffer is set to 'R11G11B10'