Recently I discovered a strange problem when Particle Patch is active: (there is some dark shadow that partially covers the map and when I exit the map and turn myself, then reopen the map, the shadow is in another angle)
Strange thing - it wasn't like that before I had to restore my mod overwrites in MO2 after MO2 crash. (probably something overrode that faulty part before)
Now I've tried disabling every mod, until I found out that it's specifically the Particle Patch. When I disable it, problem disappears.