I flat tow a Jeep Cherokee. It could be if the Jeep sways a little bit. Crosswind uneven roads could make the Jeep sway and the front end move. I definitely don't feel it when I am not towing except when a semi passes me. I wonder if I beef up the back end. Better sway bar and shocks. Not sure if that would help. Just guessing.
I use Blue Ox base plate and tow bar also