Hold on. The only time u should see 1500 to 2000 rpm is in 1st gear. In a higher gear, that is called lugging the engine in my book, and bad things can happen when u do that in a machine built for performance. In 1st gear, is the only time mine sees that engine speed. I downshift when slowing in traffic or for a reptiles or stop sign to keep reeves up. I never use the dumb Auto Stop/Start or coast function, and don't want the PDK shifting up to 5th gear at allow speeds. I try to cruise at 3000+ rpm, shift manually to đo that, and my engine is always eager to go when I hit it. Maybe Porsches make for lousy driving appliances for folks who just want everything automatic and slow. I have to pass those kinds of folks every day. If I feel sick and don't want a spirited drive, we have a 2015 RX350 in the garage that drives soft and wallows. It's wifey's car but I use it for low spirited occasions and for driving in bad weather. Please don't tell her but for me its our beater.The stumble will occur in all modes and all gears including when in manual. But like many people has reported, it will only happen when accelerating slowly, certainly never when on boost.
At first I thought it was the PDK but since it also occurs in manual I have pretty much ruled that out. Anyway, it will be difficult to get any fix for this problem as Porsche dont even acknowledges that it exists. Maybe they dont know of forums like rennlist, 6speedonline and macanforum either
I did sorry. 0 and >To @Rollep and others with stumble, I too have it and can't remember when I first noticed it, but at 10,000 mile service I had service tech with me for a drive and of course nothing happened. It only occurs around 1700 RPM in auto mode, with a light throttle, and in 1st or 2nd gear. There is no stumble in manual mode.
For me, not a deal killer, as I've come to accept it rather than get all worked up over it. (There are only 3 choices in life - accept situation, change situation or remove yourself from situation. Moment of Zen now over.)
Thanks for mention above @WHT TGR but I think you meant @big al, my evil twin.
Or have your dealer accompany you on a test drive of other turbos on the lot and see what happens.Take it to another dealer. I think your current dealer is giving you the run-around. My 2016 Turbo had a transfer case replaced & I had no problems on acceleration after that.