[2020] SCreen Stutter with a lot of trees.

HI i experienced this problem a couple of times already, seems the cheery trees , if there are a lot on the same spot cause major graphic lag, even on a rtx2070. ( down from 180 to like 40 frames / sec. ) Settings ultra. might that be the falling cherry leafs ? ( Note: i dont use that many trees on one spot - but apparently many map makers do . i dont want to know what lower tier graphics card deliver there)