How to reproduce:
1. Open the user's attached project "UdcJam20Escape.zip"
2. Open the "SampleScene" Scene
3. Enter the Inspector's Debug mode by pressing the "More Items" button (top-right corner of window)
4. Select the "DefaultGlobalLight2D" GameObject and in the Inspector windows tick the "Shadow Intensity Enabled" box
5. Enable the "DefaultGlobalLight2D" GameObject

Expected results: GameObjects cast shadows
Actual result: GameObject shadows are not visible

Reproducible with: 12.0.0 (2021.2.0b1), 12.1.4 (2021.2.13f1, 2022.1.0a1), 13.1.5 (2022.1.0b9), 14.0.0 (2022.2.05)
Not reproducible with: 7.7.1 (2019.4.35f1), 10.8.1 (2020.3.30f1), 11.0.0 (2021.1.28f1), 12.0.0 (2021.2.0a21)

Notes:
- Unticking the "Shadow Intensity Enabled" box resolves the issue
- Reproducible with all Light 2D Types
- Moving light source or GameObjects close to light source resolves the issue