How to reproduce:
1. Create a new HDRP project
2. Import the attached materials from "Test Materials.zip"
3. Open any folder in the "Test Materials" folder
4. Select both materials
5. In the Inspector window toggle the "Motion Vector For Vertex Animation"
6. Check each material's Inspector window for changes to "Motion Vector For Vertex Animation"

Expected result: "Motion Vector For Vertex Animation" gets toggled for both of the selected materials
Actual result: "Motion Vector For Vertex Animation" gets toggled for only the newest created material

Reproducible with: 10.7.0 (2020.3.24f1), 12.1.2 ( 2021.2.5f1), 13.1.3 (2022.1.0b2)
Not reproducible with: 7.7.1 (2019.4.33f1)

Notes:
- Newest created materials are named "Newest Material"
- Reproducible with any Shader Graph preset, except Decal Shader Graph