Steps to reproduce:
1. Open Unity and load the project.
2. In the Project window navigate to Packages/Automatic Performance Profiler/Editor/UI and open PerformanceManagerControl.uxml Visual Tree Asset in UI Builder
3. Select the #TestList element in the Viewport or in the Hierarchy
Expected result: Highlights the selection and shows all elements
Actual result: The “#VisualElement/#TestList/ScrollVIew/#unity-content-and-vertical-scroll-container” VisualElement disappears
Reproducible with: 6000.0.0f1, 6000.0.17f1
Could not test with: 2021.3.43f1, 2022.3.44f1, 2023.3.0b10 (Automatic Performance Profiler package is not supported)
Testing environment: macOS Sonoma 14.5 (Intel), Windows 10 (by user)
Not reproducible on: No other environment tested
Note: Dock or undock the UI Builder window to make the VisualElement reappear