my 2019 Pacifica limited started to have same issue, just expired my factory 3yr/36K miles warranty (dang it). Uconnect would restart itself very 3-4 minutes ( i parked the vehicle in the garage on a Friday evening ) started dong some research learned this is a known issue with Chrysler radio unit. However, what i did not learn from other folks is that it will also drain the battery, which happened in my case i planned to take to the dealer on Friday but gave me an appt the following Monday by that time damage was already done to the battery. Vehicle would not start. Dealer said both main and aux battery dead and $700 (parts+labor) for changing and still they are trying to diagnose what the problem is. I called Uconnect they said my uconnect unit would need a software update that is available only via Dealer portal and that would fix the restart issues but they or dealership never warned me that i should unplug my battery 'coz it would have adverse effect on battery and eventually kill it...
Hoping Uconnect or Chrysler will cover my battery costs as well as any other expense with it.
waiting for further update hope this would benefit someone.