Step to repro:
- Open an URP project with VFX package installed
- Create VisualEffectAsset
- Create SG & enable "Support VFX Graph", save it.
- Assign this SG to VFX Output
- Observe empty "Surface Options" as expected in inspector of VFX Output
- Go back to SG and now toggle the option "Allow Material Override", save it.
- In VFX Output, observe "cast shadow" is appearing twice.

Expected:
- Cast Shadow is supposed to be hidden by the material settings

N.B.:
- Can be also reproduced directly loading attached package (compare state of two output)
- Changing any settings in material and reset it will workaround the issue
- Only reproducible in 2022.3 & 2023.1, 2023.2.0a18 introduced a new workflow where the problem is irrelevant
- See also https://forum.unity.com/threads/particle-casts-full-quad-shadow-when-shader-graph-is-used.1453450/#post-9128491