How to reproduce:
1. Open the “IN-82335_repro“ project
2. Import the “materials“ package located in the Assets folder
3. Navigate to Window → Rendering → Render Pipeline Converter
4. Make sure “Built-in to URP“ is selected
5. Select “Material Upgrade“ and press “Initiate and Convert“
6. Open the “New Scene“ and observe the “Cube“ GameObject

Expected result: The GameObject is opaque
Actual result: The GameObject is transparent or seems to consist of particles

Reproducible with: 2022.2.0a11, 2022.3.42f1, 6000.015f1
Not reproducible with: 2021.3.42f1, 2022.2.0a10

Reproducible on: Windows 10, Windows 11
Not reproducible on: No other environment tested

Note: Could not reproduce in HDRP