Jeep remote and gauge issue

Also: brought to second mechanic and he checked codes and all it brought up was my satellite radio was wrong time zone. We cleared it reset it. Didn’t make a difference still did it. I asked about battery be slowly dying he said if battery, your presets wouldn’t be there either not just the time resetting back to 12:00am. Jeep said it could* be* the other computer which is 649+ labor but no guarantee that’s what it is tho they won’t know unless they replace it or... which he thinks it is a temp related issue Temp related how? Fob won’t unlock/ lock door and remote start won’t work but inside door locks will. Jeep said when they had it they contacted corporate about what else to do and everything they suggested they tried and it still does it. At first I thought it was a time thing. Jeep checked software everything’s updated and fine. Ex husband still wonders if battery because if too cold the amps... may drain just enough to mess with things. But it’s not that cold it been avg 40-55 at night. Jeep reimbursed the wcm price almost 400 with more labor and new keyfob since that wasn’t the issue they thought. If I put this other computer in for 649 I can’t be reimbursed for since electrical... and if This part isn’t it I lose 649 for a guess?? Don’t want to go this route yet. Could it be battery? Could or how could it be temp related? Any other suggestion I would appreciate

Ok cycled thru resetting time a second time today and let it warm up for almost 15 minutes turned off walked away tried to use key fob and nothing. Maybe after I actually drive it to bank yet today which is right down road? Raining and 46 degrees right now. Sometimes can reset come to work turn off and mid morning try to use keyfob and works but still have to reset everything and it will hold. Hence why thought maybe had something to do with the computer and time... Jeep says they never seen anything like this