OK, I don't know if our 2012 is just picking up the vibe, but yesterday got the fault message again. Same circumstances, pulled up to curb after driving about 10 blocks put it in Park and left the engine idling. About 2 minutes into idling the "suspension fault" message displayed. Turned off the car and on restart no message.
Both times this has happened have been short drives (less than 1/2 mile) followed by waiting at idle with the transmission in Park. Both times the message reset on restarting the car.