Discovery Sport high speed after engine start

Hello together, I have the problem with my recently acquired Land Rover Discovery Sport Si4 213KW EZ. 03/2019 (built from 2017-2019) that the speed after the cold start, or if the engine was out for more than 20 minutes, runs for about 14 seconds with approx. 1600 revolutions per minute. In this time it is not to be thought of driving away. It happens to me very long. Requests from several Land Rover dealers (also from which I bought) had the result that nobody can say if the Since no error has been made, the statement came after the purchase that this would have to be normal if no error is stored. Also several inquiries with Jaguar Land Rover Germany made no statement, there you are not even able to ask in the factory for confirmation. Does anyone here have this engine, or does someone who has the engine and can say if that is normal? Many greetings D2019