MeshLOD doesn't work properly on URP/Metal

Repro steps:
1. In URP/OSX, import the attached package.
2. Open the scene and observe the VFX is showing (0) in (usually) two rows.

Expected outcome:
The VFX to show 0,1,2,3 based on the distance. Two rows (opaque and transparent) to appear.

Note:

• Recompiling the effect produces occasionally a different result (parts missing, or rarely another mesh LOD showing)
• Seems to work fine in HDRP OSX
• Works fine in Win / DX11