check everything in your steering linkages. My tie rod ends on my 2014 went bad and had no visual indicators until the rig was suspended in the air and someone pried on them with a bar, then the movement was dramatic. It seemed that with the weight Was enough to create friction to hold them in place, but when driving they were all over the map. It took a long time to recognize as the Jeep has always blown from lane to lane, so I just got used to constant drift correction and didn’t see how bad it was getting.
Reminds me of a bumper sticker I saw “Officer I swear I’m not drunk, I’m just driving a Jeep!”