I've had this issue as well. Bought my DJ July 5th. I've noticed it 3 or 4 times, the touchscreen and cluster panel go dark for a split second and come back on. Never noticed it have any affect on the engine though.
Now you have me wondering if I should take mine in to be looked at. Currently at 3,200 miles so the 1st oil change is coming up, maybe I'll mention it then.