When its being Night in the Horizon it starts Flickering

If you go to the limit or the corner of the map, and when it´s being night, in the horizon it starts flickering between dark blue and light blue. I will try to take 2 pictures, one pic with the dark-blue sky in the horizon, and the other with the light-blue sky in the same place.

I will be updating this issue if there is any anomaly in the sky....
I'll upload the pics (if i try to get this because it´s difficult) This Week