My game loses fps or something happens that make it unplayable

Since I update to the Copper Age Update, my game has been losing frame rate or something has been happening that causes lag in the controls. When I move, the character continues to move even if I don't press the joystick. Also, when I tap, it continues to tap even if I don't touch the screen. When I rotate the camera, the frame rate stutters or it simply doesn't rotate at all.