How to reproduce:
1. Open the “MultiEdit“ project
2. Open the “SampleScene”
3. In the Scene view window select the “GameObject”
4. Then select both “GameObject” and “GameObject (1)” by dragging a box on the diamond-shaped icons
5. In the Inspector window observe the “Test Script” Component’s “Value” field

Expected result: The “Value” field is not shown or cannot be edited
Actual result: The “Value” field is shown and is editable

Reproduced with: 2021.3.34f1, 2022.3.17f1, 2023.2.6f1, 2023.3.0b3

Reproduced on: macOS 14.1.1 (Intel) (by reporter), Windows 11
Not reproduced on: No other environment tested

Note: The “Multi-object editing not supported.” message is shown in the Inspector for both the actual and the expected results