Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Open the Build Profiles window (File > Build Profiles)
3. Dock the Build Profiles window
4. Open the Project Settings window (Edit > Project Settings)
5. Dock the Project Settings window on top of Build Profiles docked window
6. Select the Editor tab in Project Settings window and enable Hide Classic Platforms
7. Observe the Build Profiles window

Actual results: The right tab of Build Profiles window shows a classic platform selected

Expected results: The Build Profiles window is fully repainted and does not show any classic platforms

Reproducible with versions: 6000.4.0a2

Can’t test with versions: 6000.0.60f1, 6000.2.8f1, 6000.3.0b6 (no feature)

Tested on (OS): MacOS Silicon Sequoia 15.6.1, Ubuntu 24.04

Notes:

• Does not reproduce if Project Settings window is not docked