Shadows created by real-time Spotlights are rendered at a very low resolution on terrain when HDRPAsset Lit Shader Mode is set to Forward or Both

How to reproduce:
1. Open the attached “IN-123683.zip“ project
2. Open the “SampleScene”
3. Switch to Camera_LowResShadows as your Main Camera
4. Observe the Game View

Expected result: Shadows are not low quality
Actual result: Shadows are very low quality

Reproducible with: 2023.3.0a16, 6000.0.62f1
Not reproducible with 2023.3.0a15
Could not test with: 6000.2.12f1, 6000.3.0b9, 6000.4.0a4 (Constant errors are thrown every frame)

Reproducible on: Windows 11 Pro (24H2)
Not reproducible on: No other environments tested

Workaround: Set Shader Precision Model to Platform Default (Edit → Project Settings → Player → Other Settings → Shader Settings)