How to reproduce:
1. Open the attached “IN-138164“ project
2. Open the “FillGradientRadiusTest“ scene
3. In the Hierarchy, select the “UIDocument“ GameObject
4. Enter Play mode
5. Note the total diameter of the Radial Gradient inside the Game view
6. In the Inspector, change the “Radius“ property of the “Radial Gradient Test” Component to 50
7. Observe the Radial Gradient inside the Game view

Actual result: The Radial Gradient did not change
Expected result: The Radial Gradient shrunk by half of it’s previous diameter

Reproducible with: 6000.3.0a4, 6000.3.12f1, 6000.4.1f1, 6000.5.0b1, 6000.6.0a1
Could not test with: 2023.1.0a1, 6000.0.71f1 (Radial Gradient was introduced in 6000.3)

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

Note: This issue also reproduces in the Player, tested by changing Radius on a timer