Night lighting flickers after SU6

I remember when this simulator was so so amazing at begin, with lovely night lighting (and other aspects like live weather, but that’s another story). Then something has changed for me, I don’t know when exactly. All I can say is that for months, flying during night has become not so interesting anymore. As topic title says, lights of cities, runway, taxiways, have shimmering. Flickering. Both on low and high altitudes. My settings have been always same: everything on ULTRA, TAA antialiasing, TLOD 400, OLOD 200. RTX 3090. Ultrawide monitor 3440 x 1440. Scaling resolution set on 100. Wishing for things to come back like they used to be, long time ago.