I know I've seen this post before but was wondering if other people who experience this have had any luck with Porsche resolving this issue. In my 2018 Macan S I have PSE and SC that was added after delivery. In normal driving mode all seems well. The problem is I never drive in normal mode. 99.9% of the time I drive in Sport mode. I drive around town mostly and being in top gear is meaningless. My Macan always stumbles just as you pass from about 1800 RPM on a slow but steady acceleration. This occurs in all the gears from first on up until you cruising above 2000 RPM. I don't want to waste my time bringing my car back to the dealer only to be told the vehicle is fine. I've heard this is a glitch, possibly do in part, with the variable cam timing. Back in time, many years ago, when I was a motor head, I would associate this with an ignition miss. Can anyone enlighten me on their experience with this phenomena?