Steps to reproduce:

1. Create a new Unity project using Universal 3D template
2. Create a new UI Document (Assets > Create > UI Toolkit > UI Document)
3. Open the created UI Document
4. Add a Label from Library to the Hierarchy in UI Builder window
5. Rename the Label in the Hierarchy to any name and save
6. Rename the Label in the Inspector of UI Builder to a different name and save
7. Repeat steps 5 and 6 a few times
8. Observe the Console window

Actual results: "NotSupportedException: An element can track properties on only one serializedObject at a time" error is thrown

Expected results: No errors are thrown

Reproducible with versions: 6000.2.0b1, 6000.2.0b4 

Not reproducible with versions: 6000.0.50f1, 6000.1.6f1, 6000.2.0a10 

Tested on (OS): macOS Silicon Sequoia 15.3

Notes:

• Seems to reproduce with all the components