Hi, I don't think you will het the back wheel t spin unless you take out the fuse for the ABS.
I've 4k miles on my Rocket TFC and done a few "launch" starts with shift assist too and no issue, but can't spin the rear or wheelie with the fuse in place.
Dyno run showed 156.44HP and 142ft/lbs and clutch still ok.
Hoping you are just unlucky, but why not write direct to the factory and get parts quicker?
I've called about an issue I had and got a call back from a director and offer a loan bike while my issue was sorted.