Reproduction steps:
1. Open the attached “My project (15)” project
2. Open the “Assets/NewUXMLTemplate” Visual Tree Asset using the UI Builder
3. In the Viewport of the UI Builder window, observe the upper Label’s text
Expected result: The text fits into the Label
Actual result: The first line goes outside the bounds of the Label
Reproducible with: 6000.2.0b6, 6000.2.2f1, 6000.3.0a5
Not reproducible with: 6000.0.56f1, 6000.2.0b5
Reproducible on: macOS Sequoia 15.6 (M1 Max), Windows 11
Not reproducible on: No other environments tested