Your processor might be overheating. Try playing in a cooler environment or using a phone cooler fan. Unlocking 60 FPS on a very old device can sometimes cause more lag due to heat than staying at a stable 30 FPS.
Use a "Game Mode" or manually close apps like Chrome and Instagram before playing. Is It Safe? Avoiding the Ban Pan pubg mobile 60 fps file updated
Your character responds faster to your swipes and taps. Your processor might be overheating