From BrianTee
There was a bug saving Overshoot reduction. I know some were saying getting back to the line caused the vehicle to oscillate, so double check if your settings isn’t set to 0.1 Generally a good setting is 1.0
The fix is in the updated release - no version change at all https://github.com/farmerbriantee/AgOpenGPS/releases/tag/4.3.10