FPS DROP while gaming (BGMI) IOS 26

I am unable to play bgmi at 120fps after the iPad iOS 26 update. The game starts with 120fps but only for 3 minutes or less then the frames drop to 30-40fps. There are no issues with my in game settings and it's apple software glitch however i get a constant 120fps while screen recording my game. But this makes my device heat up and increase lag. I have tried all types of settings within the game as well as ipad. This problem still persist.please i need help with this asap.