Drop in FPS when using a Circular cutter. (Fallout 4)

Faced with this problem, when using a Circular cutter Mr. assistant drops the game performance, and it works mainly at a certain area, ie if you go a certain distance then everything seems to become standards. But if the power armor to make a powerful landing (forgot how called), the performance will fall again. Treated only by rejoining the game. Who knows how can I fix it?