I bought a Vectra C 2007 with 2.2L engine and Automatic gearbox
the car only covered 69500KM
it had all it's oils changed at OPEL dealer (engine, brakes, transmission)

the car is fantastic and the gearchanges are like smooth click (tiptronic mode) however after driving it for a long distance then if I engage D the gear changes become not smooth at all the car becomes jerky

yet if I stop the car for half an hour for example, the car returns very normal

Please advise
is this normal behaviour