[S15] The problem of unstable frame rate

Heya friend ! I have 10700kf and 3070 , 1440p 144hz, and i ever had this issue of fps who drops sometimes randomly to around 100 fps in full low ! I just need to move a little bit and the fps goes normal again, its strange but what can i tell for me it ever was here in game (Im day 1 player) 

Its not related to an optimisation side of the map because at the same place it will not happen twice, its just random, with nothing in background.