How to reproduce:
1. Open the “IN-106022_TMPMaskOffIssue“ project
2. Open the “SampleScene”
3. In the Hierarchy window select “Canvas/Text (TMP)” GameObject
4. In the Inspector window, for the Material Component select Debug Settings > Mask
5. Change the “Mask” value to “Mask Hard”
6. Observe the value

Expected result: The “Mask” field reflects the value change
Actual result: The “Mask” field stays “Mask Off”

Reproducible with: 2022.1.0a1, 2022.3.63f1, 6000.0.51f1, 6000.1.9f1, 6000.2.0b7

Reproducible on: macOS 15.5.0 (M1 Max), Windows 11
Not reproducible on: no other environments tested

Notes:
- The field changes can be seen by changing the Inspector from “Normal” to “Debug”
- Reproducible with TextMeshPro shaders: Distance Field, Distance Field Overlay, Distance Field SSD