Two Service reps from two different dealerships told me that when I complained about my stumble. Both times they preformed the TBS on the tranny. Cleared up for a while then came back, both times were under 8k miles.
All seems well now since Im past 11k miles.
Call customer service.
Mine had a stumble when new but now it has gone away, 13k miles. Can’t explain why but its smoothed out. Surely it didn’t take this long for the transmission to learn my driving habits.