Update: I ended up taking the M4 to Chuckwalla and low and behold it throws the same "chassis malfunction" code and put me into limp mode on the fourth session of day 1. Didn't bother to go back for the second day for fear it would do it again. Track fees, hotel charges, and my time wasted.
I'm taking it back to the dealership obviously and am not going let them brush this off as another "oh well, you were driving it too aggressively". One of two things
must be true:
A) There IS something wrong with my car. OR
B) The new BMW M4 is NOT track capable.