Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/Materials/Cloud.mat” Material in Inspector
3. Change Secondary Color

Expected result: Each property instance is independent
Actual result: Each Secondary Color property synchronizes with each other

Reproducible with: 6000.0.62f1, 6000.2.13f1, 6000.3.0f1, 6000.4.0a5, 6000.5.0a1

Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested

Note:
- In the Shader Graph “Assets/Shaders/Cloud.shadergraph”, see the many properties with the same name that are synced with each other (as they share properties of their original property)