Random map generator is broken in 1.20 ?

[serg3d1]

I now have often to do two or three try to get good map with random generator. For example I set forest to 15 and getting almost all the map covered by forest. Next try with the same setting I'm getting 3-4 forest hexes (30x30 map)
Next try with mountain 15 I'm getting around fifth of the map covered by mountains. I'm using AI friendly && People Republic settings.