How to reproduce:
1. Open the attached project
2. Open UI Document located in Assets -> UI Toolkit -> "interface"
3. Take a look at the Slider element
4. Enter Play Mode and go to Game view
5. Drag the slider component and observe Input Field next to it
6. Try to enter any value into Slider Input Field

Expected result: The slider value appears in the Input field. It changes after dragging the slider. The user is able to type value in the Input Field
Actual result: No value appears after entering Play Mode, neither after dragging Slider, neither after typing something

Reproducible: 2022.1.0a16