Reproduction steps:
1. Open the attached “IN-96605.zip” project
2. Double click on the “ExampleDocument.uxml” from the Project Window
3. Select the “.example” selector in the UI Builder
4. In the Inspector expand the “Transition Animations”
5. Observe the Duration property

Expected result: The property is disabled when set by a variable
Actual result: The property remains enabled and is editable

Reproducible with: 2022.3.59f1, 6000.0.41f1, 6000.1.0b10, 6000.2.0a6

Reproducible on: Windows 11, macOS 15.3.1 (M1 Max) (User reported)
Not reproducible on: No other environment tested

Note:
- Expected result can be seen when expanding the “Spacing” tab and looking at the Padding.top property, where it works as expected. Except for the 2022.3.59f1 version, where both properties remain enabled