When any VFX Graph is assigned to "Asset Template" from "Visual Effect" prefab causes editor to crash, refer the attached video

Steps to repro:
1. Create a new project
2. Window > Package Manager > Visual Effect Graph (7.1.8) > install
3. Hierarchy > Create > Visual Effects > Visual Effect
5. Make a prefab of "Visual Effect" GameObject
6. Project > Create > Visual Effects > Visual Effect Graph
7. Select "Visual Effect " prefab in the Project window
8. Inspector > Visual Effect > Asset Template > try to assign different VFX Graph

Actual Result:
Editor crashes on assigning VFX Graph to "Asset Template" of Visual Effect prefab

Expected Result:
VFX Graph assign to "Asset Template" assigned gracefully

Reproducible in:
2020.1.0a20, 2020.1.0a12, 2019.3.0f6, 2019.3.0f2, 2019.2.2f1 with package version 7.1.8, 7.1.7, 7.1.6, 6.9.0

Working fine in:
2020.1.0a11, 2019.3.0f1 with package version 7.1.8, 7.1.7, 7.1.6 7.1.5, 7.1.2

Environment:
Windows 10 & macOS 10.14