How to reproduce:
1. Open the “FontIssueStripped.zip“
2. Navigate to the “Assets > Editor“ folder in the Project windows
3. Open the “SimpleCustomEditor.uxml“ file in the UI Builder window
4. Type the “abcdefghjklmnop“ text in the Label
5. In the UI Builder Labels Inspector “Inlined Styles > Text“ section set Text Generator Type to Advanced
6. Save the changes
7. Observe the text in the Viewport

Expected result: Text is not distorted
Actual result: Text is distorted

Reproducible with: 6000.0.40f1, 6000.1.0b8, 6000.2.0a5
Could not test with: 2022.3.59f1 (Advanced Text Generator not available as a feature)

Reproducible environment: macOS 15.3 (Intel), Windows 10 (22H2), macOS 15.2 (M4 Max) 
Not reproducible environment: No other environment tested

Notes:
- Sometimes after the project is closed and reopened the issue does not reproduce until you edit the text in the Label and set the Text Generator Type to Standart and back to Advanced
- To reproduce the Font asset must have Multi Atlas Textures enabled and the Atlases must be full
- Reproducible in the Player