Sky color is visible for a brief moment after applying Night Vision under Darkness effect

While under darkness effect, sky fog color is visible for a few moments after applying night vision, then the color gets corrected albeit abruptly.

Expected behavior

Fog color of darkness effect would be dark at all times, like how it is without night vision.

How to reproduce

1. Apply yourself night vision effect.
2. Apply also darkness effect.
3. See the fog color.