Steps to reproduce:
1. Create a project
2. Create Canvas and Slider GameObjects in the Hierarchy
3. Select Handle GameObject in the Hierarchy (Slider > Handle Slide Area > Handle)
4. Change Width value in the Inspector
5. Undo the change and observe the Slider Handle in the Scene

Actual results: Slider Handle becomes a different size than default
Expected results: Slider Handle returns to default size

Reproducible with versions: 2021.3.52f1, * 2022.3.62f1, 6000.0.50f1, 6000.1.6f1, 6000.2.0b4

Tested on (OS):* macOS Sequoia 15.5 (Intel)

Note: Width value changes back to the default value (20) in the Inspector but not in the Scene and Game windows