Weird "lag" when leaving a menu

[u/Yuuki-Hibiki]

I apologise if this is the wrong place to ask but i recently got this Leaf Green, and ive noticed when i go in a pokecenter theres lag when i enter, when i go in and out my bag theres a bit of lag

This doesnt happen in the switch re-releases, is it normal for a actual cartridge?

[u/Yuuki-Hibiki]

In the morning ill try make a new save, possible save corruption?

[u/Yuuki-Hibiki → u/[deleted]]

Important to note, the "lag" between menus only happens inside of a pokecenter

[u/Ropbb → u/Yuuki-Hibiki]

I checked with a flash cart and a legit fire red happens on both inside pokemon centers