Engine Shut Off Without Warning problems of the 2016 Dodge Caravan

We bought a 2016 Dodge Caravan and had a "remote" start installed through the dealership. The van would shut off when the remote start was used, sometimes. When it shut off in neutral, before I could even make it into the van, the electrical acted like it was disconnected from the battery, (the clock would be flashing, radio stations un-programmed, airbag light on. ) the dealership had our van for 2 weeks (no rental), and they never could duplicate or fix the problem. We picked up our van and did not receive paperwork. @three months later, the van died again. But this time while in drive-at a complete stop, while at a drive thru bank atm. When it shut off, the electrical acted like it was disconnected from the battery, (the clock would be flashing, radio stations un-programmed, airbag light on-same as before) I took the van to the dealership. They estimated it would take 3 days to repair and gave me a rental. In less than one day they did a computer "update. " on my way home from picking up the "repaired" van, it shut off again, this time in drive-at a complete stop, in a fast food drive thru. I took it back on the same day, and was given another rental. This was in October. (paperwork states: oct 11 and oct 13. ) Friday oct 13 I received a call from the dealership to bring back the rental. When I asked if my van was fixed I was told, �no, but the dealership isn't going to pay for the car rental anymore. � the dealership opened a star case from corporate and were told to close the case, even though nothing was fixed. I returned the rental and picked up my van. Oct 18, my van shut off again, while at a complete stop in reverse. I am waiting to hear back from the dealership, to see if they can fix this problem-again.