APV baking settings are not saved until you bake

Steps to reproduce:

1. Create a new URP scene and enable Adaptive Probe Volumes in Renderer settings.
2. Enable Sky Occlusion in Window > Lighting > Adaptive Probe Volumes.
3. Save (Ctrl + S on Windows).
4. Close and reload the project.

Actual results: Sky Occlusion is no longer enabled.

Expected results: Sky Occlusion should still be enabled because the project was saved.

 

Notes: This is probably because the APV baking settings (BakingSet) are not persisted until you do the first bake.

Reproducible with versions: Probably all versions which has APV. We suspect this behaviour was there since the beginning of APV.