How to reproduce:
1. Open the “HDRP Transparent dark bug“ project
2. Open the “OutdoorScene“
3. Enter the Play Mode
4. Observe the Game view

Expected result: The “Sphere“ and the “Cube (6)“ GameObjects are not rendered darker
Actual result: The “Sphere“ and the “Cube (6)“ GameObjects are rendered darker

Reproducible with: 2023.3.0a6, 6000.0.6f1
Not reproducible with: 2021.3.39f1, 2022.3.33f1, 2023.3.0a5

Reproducible on: Windows 10 Pro (22H2)
Not reproducible on: No other environments tested
Could not test on: macOS 14.5 (Intel) (Path tracing not supported)

Notes:
- Also the specular reflection of the light source on the “Sphere“ GameObject with the “Transparent“ material is not visible
- The material “AO OFF“ without Ambient Occlusion is rendered correctly