+1 traction control/bcm did it. It can cut back your fuel or throttle position and really screw the pooch if you downshift and hit the gas too quick. It calculates the torque and corrects if the "calculated torque" is too high. Quick check try this maneuver again with t/c off if no issue then you know what to do next time. If it falls on its face like Wile E Coyote, then you got a problem.
2010 2SS IOM
Changing a few things, new numbers to come soon..