On the 2013 Journey I got new . . . picked up from dealer one day, next day was message on screen (8.4"? Uconnect) saying bad disc or something like that . . . took to dealer and they replaced the "telematics" unit (i.e. radio, gps, etc, etc) told me it was a "known issue" on all the large unconnect screens in all the vehicles . . . !!! Had it replaced once more under warranty and was fine . . . if you can get replaced on warranty, do it.
Also, go to unconnect website : https://www.driveuconnect.com/
Can get software updates and map updates . . .