Help needed: I guess nanites attacks optimalisation

I played game yesterday and everything was fine, stable 58-60 FPS. Today, turning it on, I have barely 18FPS. What the hell just happened? Yesterday I left the game while in R&D, shortly after the terminal requiring weird jump. Is this some weird bug, glitch, or what? Playing this kind of game with less than 1/3 framerate is quite atrocious (especially that game reacts 3 times slower for inputs)

^PC player