Steps to reproduce:
1. Create a new Unity project
2. In Hierarchy window right-click on “SampleScene”
3. From the menu select “Add New Scene”
4. Create multiple Scenes in the Hierarchy window (for example, 1.scene, 2.scene, 3.scene, Untitled.scene)
5. Select created Scenes in Hierarchy window
6. Observe the selected Scenes highlight color 

Actual results: Selected Scenes are not highlighted in blue color
Expected results: Selected Scenes should be highlighted in blue color

Reproducible with versions: 6000.4.0a5 (12f7d227ffca), 6000.4.0b1, 6000.5.0a3
Not reproducible with versions: 6000.3.1f1, 6000.4.0a4 (e3c84445ccf5)

Tested on (OS): macOS Tahoe 26.1 (M1)