How to reproduce:
- Import the attached package to 2021.3 version (I used URP but it should be fine with HDRP too)
- Upgrade the project to trunk
Actual result:
Observe that error is thrown in the console (: (Null Asset) : Exception while compiling expression graph: System.InvalidOperationException: VFXAbstractSpawner excepts a custom behavior for custom callback type
Some VFXs are not rendered but this is most likely the consequence of UUM 3311 and UUM 1188 as they do result in this behavior
Note: Haven't checked if it is a regression