Steps to reproduce:
1. Create a project
2. Create > UI Toolkit > UI Document
3. Double-click on newly created UI Document asset to open UI Builder window
4. Drag Toggle element to the Hierarchy section
5. Select the child of Toggle element
6. Select Toggle element and observe text field under the elements name in the Inspector section
Actual results: Text field becomes narrow
Expected results: Nothing of note happens
Reproducible with versions: 6000.0.0b15, 6000.0.47f1, 6000.1.0b15, 6000.2.0a9
Not reproducible with versions: 2021.3.51f1, 2022.3.61f1, 6000.0.0b14
Tested on (OS): macOS Sequoia 15.3.1 (Intel), Ubuntu 24
Note: Repeat steps 4-6 several times if the issue does not reproduce