Twig xl 2021 editon

Hi All,

So I just bought this quad which is meant to fly on 4s 500mah however it sounds really funny when flying on 4s like a motor scratching cant really explain it. It is also very wild when doing a flip and always drifting back but that could just be the center of gravity.

Now on a 3s 1100 pack it is a dream to fly motor sounds smooth it flips nice and has plenty of power. What is going wrong on 4s?