"NullReferenceException" error is thrown when the Hierarchy window burger button is pressed

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Click the burger button in the Hierarchy window
3. Observe the Console window

Actual results: "NullReferenceException: Object reference not set to an instance of an object" error is thrown

Expected results: No errors are thrown 

Reproducible with versions: 6000.3.0a3, 6000.3.0a5

Not reproducible with versions: 6000.3.0a2

Tested on (OS): macOS Silicon Sequoia 15.5, Ubuntu 24.04