How to reproduce:
1. Open the attached “IN-96235” project
2. Open UI Builder window
3. Make sure “Hello_world.uxml” is open in UI Builder
4. Find “#Label” element in the Hierarchy
5. Expand Text section in the Inspector
6. Make sure “Text Shadow” color’s alpha is set to 255
7. Open text’s color selection window
8. Move the alpha slider left and right
9. Observe text shadows in the Viewport

Expected result: Text shadow transparency mimics texts transparency
Actual result: Text shadows remain solid color

Reproducible with: 2022.1.0a7, 2022.3.59f1, 6000.0.41f1, 6000.1.0b9, 6000.2.0a6
Not reproducible with: 2021.3.49f1, 2022.1.0a6

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:
- When the uxml is attached to UI document, text shadow remains opaque in Game view, regardless of version
- Adjusting color/alpha with rich text is also affected