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How long after you started the cold car did you start going full throttle? Assuming the car is parked somewhere where temps are below 60 degrees and it's a stone cold start, it takes a ~15 minutes of driving to get engine oil, transmission fluid, and differential oils up to temp. Coolant warms up much faster, but transmission and engine oil take far longer and are much more important. Most automatics will have abrupt shifting, delayed shifting, and weird characteristics if you hammer on them while the fluid is cold. FYI, automatic transmission fluid expands 10-15% when at temp and the transmission depends on this expansion for optimal performance and shifting.
It is very wise to not drive hard until the car is up to full operating temp, ESPECIALLY the transmission fluid and engine oil.
Lastly, you'd likely get better response on the M2 forum as you've got a DCT and the M235/M240 have planetary automatics. Your Hex tune could also be playing havoc with the torque management system as the transmission computer is trying to figure out why the torque values are so high in comparison to what it's expecting.
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The forest was shrinking, but the Trees kept voting for the Axe, for the Axe was clever and convinced the Trees that because his handle was made of wood, he was one of them.
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