Journey got towed to the dealership today. Got a loaner vehicle. Will let you know tomorrow when I get in touch with them if they found the issue and what it turns out to be. The gas mileage has been worse than what others have posted here, probably due to this transmission shift issue. Been getting about 15mpg city, about 20 on the highway. Vehicle has about about 1100km, a bit over 600 miles on it.