game lag

wifi speed drops down when open online game(mobile legends, pubg, COD .. etc), but once close the game the wifi is work greatly and so fast out side the game WHY ??

I installed the new HyperOS 2 update, released on December 22, on my Xiaomi 13 Pro (nuwa) smartphone and tried playing PUBG Mobile. Compared to previous updates, the performance is terrible, with significant lags and frequent FPS drops. The temperature remains around 35-38°C, meaning the lags...