"All fluids and filters were changed" .. but does that list included AT gearbox oil? On many modern cars manufacturers mark that it's not needed and that it's for lifetime .. so "all" by official regular maintenance procedures may had omited that.
Also in some cases flushing/filling procedure matters to be performed in right way with right steps taken.
Mine, as all the other cars i've driven, is MT, so i cannot chime in with other advices from own experience but these generic ones.
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