Fortnite regularly brings massive fps drops?

Ab
2

I'm playing Fortnite (I know I'm hopeless) and it happens from time to time that the constant 100fps suddenly drops to 10 - 15 fps for 2 or more minutes, which makes the game practically unplayable. Oddly enough, Rainbow SIx Siege runs at a constant 100fps with the best graphics settings. Is it up to me or the game?

Processor Intel i5-8300H CPU @ 2.30GHz, 2304 MHz, 4 core (s), 8 logical processor (s)

16GB Ram

GTX 1050

It's a laptop, so maybe something with it, but it doesn't make sense because even heavier games run better on better details?

Gl

Deactivate Vsync, deactivate multithreaded rendering, deactivate motion blur, set directx 12 to 11

Ab

Ok thanks, I'll give it a try