Light rendering breaks after adding Directional Light when Sun GameObject Intensity is set to low value

Reproduction steps:
1. Create a new Hight Definition 3D Template project
2. Select Sun GameObject and change Intensity to a low value in the Inspector (Light > Emission > Intensity)
3. Observe the Scene view
4. Create Directional Light GameObject
5. Disable and reenable Sun GameObject
6. Disable Directional Light GameObject and observe the Scene view

Actual result: Ground part of the Scene view is rendered light
Expected result: Whole Scene view is rendered dark

Reproducible with: 6000.0.65f1, 6000.3.3f1, 6000.4.0b3, 6000.5.0a4

Reproduced on: macOS Tahoe 26.2 (M4), Windows 11

Notes: Issue stops being reproducible only when disabling both Sun and Directional Light GameObjects at the same time or undoing every change