Independent acceleration in BeamNG for imported turbo vehicles

Am just despairing. With the latest automation version (220923.23705.1418 Exporter: 220921) I have problems with the throttle response (only with turbo-engines) when the vehicle is imported into Beam. It feels like there is a rubber band against it up to about 3000 RPM and from about 4000 or 5000 RPM it automatically accelerates even though I keep the throttle constant.
Sometimes this leads to the fact that the vehicles are no longer playable.
THX for any answer.