I don't have a BL but I assume the computer is all the same, minus the startup graphic. I have experienced that once in a while, maybe once in a couple of months of so, maybe a quarter. Usually, when it restarts, or if I power cycle the car, the problem goes away. This last time, the screen locked up and everything froze on the touch panel, it wouldn't even shut off when I turn off and lock the car! I had to soft-reset the car (holding down the radio power button + next track button until the screen reboots).
I like the car, the SYNC software needs work for sure, but I would say it's about 95% stable.
2017 Lincoln MKC AWD 2.3 Reserve 20" Polished Wheels W/ Ebony Pockets | Technology Package | Climate Package | Black Velvet + Ebony Interior