Jeep vibration

My Jeep Renegade Trailhawk 2016 makes a weird vibrating thing at 30mph. It goes away when I take traction control. I took it to the dealer, they gave me a loaner and it does that same thing! What is it?

Does this happen going down a straight road at a constant 30 MPH ?

Or maybe taking a curve/corner a little fast and the ABS and Traction control are kicking in because they sense wheel spin or excessive body roll ?

thanks It_s_Me for the quick response!

It happens going down a straight, flat, dry road.