But I’m use no Joystick because I use the flight yoke from Saitek
"joystick" it's just a generic term I used, so a flight yoke is clearly included as a joystick, which surely requires calibration, especially a proper null zone setting.
Not sure how but will try.
The control setting page of the sim, of course. Try to raise the null zone until the plane stops going away in slew mode.