Darkness effect fading in death screen causes subtle flashing

The bug

Darkness effect fading in death screen causes a subtle flashing.

To reproduce

1. Summon a warden and wait for it to inflict the Darkness effect.
2. Attack the warden.
3. After you die, stay on the death screen until the Darkness effect fades.

Expected result

The Darkness effect would not be removed, or it would not cause the screen to flash.

Observed result

The screen flashes.