Reproduction steps:

1. Open the attached project “IN-90971“
2. Open the scene “ExampleScene“
3. Open the Rendering Debugger. Go to Window → Analysis → Rendering Debugger
4. Open the Lighting tab and for the Shadow Debug Mode option, select “Visualize Cached Punctual Light Atlas“
5. Enter Play Mode
6. Try toggling the light components using UI provided
7. Observe the result

Expected result: Disabling the light components with preserveCachedShadow disabled should evict their light texture from the shadow atlas
Actual result: Disabling the light components with preserveCachedShadow disabled did not evict their light texture from the shadow atlas. Thus, other light components with preserveCachedShadow disabled are unable to be added to the shadow atlas.

Reproducible in: 2021.3.47f1 2022.3.55f1, 6000.0.32f1, 6000.1.0a9

Reproducible on: macOS 14.6.1 (M1 Pro), Windows 10
Not reproducible on: No other environments tested

Note:

• Also reproducible in Player
• To enable “Visualize Cached Punctual Lights Atlas” option in Player. Enable “Development Build“ before building a Player, then press LeftCtrl+Backspace (LeftCtrl+Delete on macOS) to open the Rendering Debugger Menu. Open the Lighting tab and for the Shadow Debug Mode option, select “Visualize Cached Punctual Light Atlas“. Close the Debugger menu by pressing the same combination of buttons. Make sure that “Runtime Debug Shaders“ option is enabled in HDRP Global Settings asset