GTA V suddenly low FPS?

When I start gta 5 it runs for 20-30 minutes with 70-80 fps, so perfect. (maximum settings). Then the fps suddenly drop to 20-30. The GPU is no longer used to 90% as usual, but only to 30-50%. You don't have to answer me if you pretend to write that my laptop is too bad or something, because that's not the case. Thanks for all helpful answers

Set up:

GTX1050ti

I7700 HQ

16GB DDR4 Ram

Maybe your cpu is too hot and clocks down

60-70 degrees, so everything is fine…

Hmm if you have good Wi-Fi maybe reinstall

I've already reset the laptop 2 times

Do you use discord in the background?