[1.3.3069] Darkness meme giving Shooting penalty in darkness

[Strill]

I have the Darkness meme, so my shooters should get an accuracy bonus in darkness.  However, even though my shooter, my target, and all the intervening terrain are in darkness (0% light), the mouseover accuracy tooltip is saying that I'm having my accuracy penalized for being outdoors in the light.

For additional context, the shooter and the target are both in a roofed area during the day, with no light sources, however the roofed area is not a sealed building.