That's serious. Is the Jeep in an attached garage where the exhaust could get in the house? Is there crime in your neighborhood? About a month ago I talked to a guy who just got his jeep back after it was stolen. Car thieves have a receiver/ recorder in their pocket and capture the remote code signal in parking lots then steal your car at night. Just a possibility it's someone else but hopefully not and you get it fixed.

 

If I am correct the Jeep will only run for 15 minutes after its activated by the remote start key fob, also the would-be thief would have to have the key in the ignition to get it out of park also being able to put the key in the running position.

 

If you think it's related to the key fob, take the battery out of the fob(s) and see if that makes a difference.