2013 X55 - I've also had a few screen freezes and a few gremlins in the ballast tank readings in between events. Most of my issues have stemmed from using the "profiles" functionality (surf left, surf right, max wake, etc.). Quick flip of the battery switch off and then back on solves the issue. Going to take to dealer and have them apply latest software updates. Pretty minor inconvenience at this point from my perspective. 15 hours on the boat so far and only happened maybe 5 or 6 times in total.
System this complex is bound to have a few minor glitches - all together, I love the new system, functions and controls that it offers. Really seems to be well done.