If I was going to say its something, I'd say it could be a front caliper. I had something similar happen when I bought mine a few years ago. When I would drive, it would feel like the back end was dragging. Happened on and off until one day it just kept dragging. When I got home, there was smoke coming from my wheel. The caliper seized and burned up the pad and rotor. Replaced the caliper and no issues since

I guess an easy way to check is to jack up the Jeep and pull off the wheels and look at the brake pads and rotors. If one looks more worn than the other, could be an indication one caliper could be a little sticky. Also if when you pull in your driveway one is way hotter than the other, could be another indication.