Editor freezes at OpenScene and continuously allocates memory when a Scene View Overlay accesses containerWindow.rootVisualElement in CreatePanelContent()

Steps to reproduce:

1. Create a new project
2. Remove the Test Framework package
3. Ensure that the Editor is closed
4. Go to the project’s Assets folder
5. Add the attached “BugScript” to the Assets folder
6. Open the project
7. Observe the launch screen

Actual result: The Editor freezes at OpenScene and continuously allocates memory
Expected result: The project opens successfully

Reproducible with: 6000.0.0f1, 6000.0.44f1, 6000.0.81f1, 6000.3.21f1, 6000.5.7f1, 6000.6.0b7, 6000.7.0a4

Reproducible on: Windows 11, MacOS M4 26.6.2
Not reproducible on: No other environments tested

Note: After 6000.0.44f1 the Test Framework package is built in and you no longer need to remove the package for the issue to reproduce