Reproduction steps:
1. Open the “ReproProject“ project
2. Open the “Assets/Scenes/SampleScene“ scene
3. Select the “GameObject Enum A“ GameObject in the Hierarchy window
4. Set the “Test Enum“ value to “A“ in the Inspector window
5. Select the “GameObject Enum B“ GameObject in the Hierarchy window
6. Set the “Test Enum“ value to “B“ in the Inspector window
7. Select the “GameObject Enum C“ GameObject in the Hierarchy window
8. Set the “Test Enum“ value to “C“ in the Inspector window
9. Select all 3 “GameObject Enum A”, “GameObject Enum B“ and “GameObject Enum C“ GameObjects in the Hierarchy window
10. Deselect all selected GameObjects in the Hierarchy window
11. Select either the “GameObject Enum B“ or the“GameObject Enum C“ GameObject in the Hierarchy window

Expected result: The “Test Enum“ value that was set remains
Actual result: The “Test Enum“ value is reset to “A“

Reproducible with: 2022.3.20f1, 2022.3.22f1, 2023.2.16f1, 6000.0.0b13
Not reproducible with: 2021.3.36f1, 2022.3.13f1

Reproducible on: Windows 11 Pro (22H2)
Not reproducible on: No other environment tested