Re: 2012 Random Shut off.
My 2012 is at the dealer today for a service appointment and what seems to be a similar problem. On three or four occasions, after decelerating from highway speed, I've had the engine die in mid-turn.
It's actually pretty alarming when it happens--I lose all power assist in the steering, which makes it almost feel as though the steering column has locked up. Not good. I'm a moose and can still maneuver the GC, but a smaller person might have problems doing so.
In my case, moving the transmission selector to "N," and touching the start button while pressing down on the brake pedal works to immediately restart it, and it otherwise runs perfectly. I just hope that they can diagnose it and fix whatever the heck is going on. I fear a "can not duplicate condition" report on the work order.