Am i the only one who has been having in-game issues lately?

So in my last 4 games (not all from the same account) the game runs normally and smoothly without any issues at the begining but then at approximately 5 to 10 mins it just stops. No bug splat, no error message pop, its just like my FPS suddenly drop to 0 and i can do nothing exept restarting the pc. I am currently reinstaling league but if someone else has the same problem please lmk. (it may be a problem with my pc but it doesent quite make sense because nothing changed before and after it happened).