How can i stop autocenter when im stopped

When you disable FFB in BeamNG.drive, the Logitech software will automatically enforce a centering spring.
When you enable FFB in BeamNG.drive, the Logitech software will disable their centering spring, and you'll instead get the natural simulated forces. These forces will tend to align your steering wheel to the tire contact patch direction. If you steer further, the sidewall flex will eventually rotate the contact patch, which will change where the steering wheel lands when you release it.

 

To be clear, we have no "feature", absolutely no code, that tries to recenter the steering wheel. If your stwheel happens to recenter, it's the outcome of how the suspension is designed for the current vehicle.
For example, if you modify your suspension to reduce caster angle down to zero, the chances are your stwheel will lose any kind of centering effect while stationary. If you increase caster angle to an absurd amount, then the centering effect will be huge, since you are basically trying to lift the entire front of the car through leverage via your arms in the steering wheel. Etc.

 

This is just how cars are built IRL.

 

If changing caster does not change FFB, then either you are using a vehicle with some defect (maybe a mod with broken Tuning menu, etc), or you are not really getting ffb. Please disable all mods and try in Safe Mode.