Big head shakes in cockpit

Hello, I noticed a bug camera in the cockpit of the Savage Carbon.

Please see video : https://youtu.be/HldaY6v6YtA I tried with the DR400 and the Savage Cub and the shakes are not so intense (although I noticed mini shakes that were not here before on these planes). I also tried with the PA28 Arrow4 from JustFlight and it is correct, no shakes at all.

Thanks.