This problem started at 18,600 miles on my 2012 Jeep, is still doing this at 28,000 miles. The Dealer has decarbed the motor, changed plugs, changed EGR valve, and changed the torque converter. They have also flashed the computer, I have tried the Fuel injector cleaner. I had a claim open with Jeep and they told me it is normal operation. The TSB that has no solution to the fishbite states that premium gas will help. I run the premium and can still slightly feel it, I've tried premium non ethanol and that seems a bit better yet but not 100% and I don't think I should have to run this in a brand new vehicle anyway. The dealership and Jeep have determined to do nothing further with the vehicle at this time as when the computer is hooked up it shows no misfire and shows that everything is working as it should be. I will try anything as I do like the jeep but this issue drives me crazy and anything that I will be trying I will do out of pocket as it is still under warranty however the dealer says they will no longer address the issue, again because the computer says its fine. The tug, skip, bump feeling is much worse with the air conditioning on, and does it basically anytime you try to hold a constant speed. Some days its worse some days better however no correlation with the weather, driving conditions etc that I can find.