Screen Space Ambient Occlusion is not visible when the directional light intensity is 0.001 or lower with the Deferred Rendering Path selected

Reproduction steps:
1. Open the attached “IN-110954“ project
2. Open the “Scene.unity” Scene
3. Disable the "Directional Light", or set its intensity to anything below 0.001
4. Observe the Game view

Expected result: Ambient occlusion is still visible
Actual result: Ambient occlusion is no longer visible

Reproducible with: 6000.0.6f1, 6000.0.55f1, 6000.1.15f1, 6000.2.0b13, 6000.3.0a4
Not reproducible with: 2022.3.65f1, 6000.0.5f1

Reproducible environments: macOS 15.5 (M3 Max)
Not reproducible environments: No other environments tested