How to reproduce:
1. Open the "NavMeshSurfaceGizmo" project
2. Open the "SampleScene"
3. Ensure that "Show NavMesh" is enabled in the AI Navigation Overlay in the Scene view
4. Ensure that "NavMeshSurface" gizmo option is enabled in Gizmos menu in the Scene view
5. Select the "Plane" GameObject in the Hierarchy
6. Disable the "NavMeshSurface" gizmo option in the Gizmos menu in the Scene view
7. Observe the blue surface in the Scene view

Expected result: The blue surface is of darker color (like selected)
Actual result: The blue surface is of lighter color (like unselected)

Reproducible in: 1.1.1, 2.0.9 (6000.0.59f1, 6000.2.10f1, 6000.3.0b8, 6000.4.0a3)

Reproduced on: Windows 11 Pro (24H2)
Not reproduced on: No other environment tested