We just had this occur for the first time with our 2015 Cherokee Trailhawk. We went over a rough patch in the road at 40 mph and the motorhome started rocking back and forth. A quick glance in the rear camera showed the Jeep swaying back and forth pretty violently. I slowed down and pulled over to check things over, thinking I had a flat. All looked ok so we took off again with no further issues. This was the first and only time it happened to us in about 2000 miles of towing.
We have a Readybrute tow bar which has an integrated surge brake. I thought the brake might be the problem so I removed it for the remainder of the tow. I'm also wondering if the wide attachment points on the Cherokee Trailhawk might be the cause of the problem (Blue Ox baseplate). This Trailhawk has a wider attachment than the Limited or Latitude, but I guess that problem occurs on all 3 models so maybe not.
Does anyone have a fix for this? Now that it happened once I am a bit worried it might happen more regularly.