How to reproduce:
1. Create a new Unity project
2. Go to Edit -> Project Settings -> Graphics
3. Set the "Lightmap Nodes" to "Custom"
4. Click "Import From Current Scene"
5. Undo the action and observe the results
Expected results: The "Lightmap Nodes" field remains at "Custom" and the checkboxes are undone
Actual results: The "Lightmap Nodes" field changes to "Custom"
Reproducible with: 6000.0.81f1, 6000.3.21f1, 6000.5.7f1, 6000.6.0b7, 6000.7.0a4
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested