iphone slowdown sometimes

Hello,

Since I’ve paid my iPhone 14 in October, I’ve been noticing (only sometimes) some slowdown on the animations, for example on the control center when I swipe down (just a really tiny slowdown but it happens sometimes still today).

Moreover, it happens as well in games but it’s way more pronounced, for example when I play Efootball 2023 in the highest graphic quality, when I play the game I notice big fps drops (down to 15-20fps) but when I swipe down to reach the control center and then I swipe up to return to my game, the fps drop is gone and my game is very fluid. It happened on 1 or 2 other games, but is there an explanation to these small details or anything to do to solve it? I have iOS 17.2, I bought the iPhone 14 brand new.

Thanks

Nelson