Steps to reproduce:
1. Create a new HDRP project
2. Select the “Sky and Fog Volume” GameObject in the Hierarchy
3. In the Inspector add a “Color Adjustments” Volume (Add Override → Post Processing → Color Adjustments)
4. Enable Contrast, Hue Shift or Saturation
5. Set it to the max value
6. Observe the Game View

Actual result: Post-processing volume overrides are not visible until a refresh
Expected result: Post-processing volume overrides are visible immediately

Reproducible with: 6000.3.16f1, 6000.4.8f1, 6000.5.0b9, 6000.6.0a3, 6000.6.0a5
Not reproducible with: 6000.0.75f1, 6000.6.0a2 (64de5ee36373)

Reproducible on: macOS Sequoia 15.7.5 (M1 Max)
Not reproducible on: No other environments tested

Notes:
- Does not reproduce in URP
- Also reproduces with “Lift, Gamma, Gain”, “Tonemapping”, “White Balance”, “Channel Mixer”
- Does not reproduce with “Bloom”