I don't think you could ever stop this no matter the car/van or the way its set up if there are grooves its going to try and follow them

I found when my p100 was standard it was bad when it started following the grooves , but now it has been changed ie coilovers,215/40/17 , poly bushes all new parts , this made it a lot better when it tries following grooves so I would not put all the blame on the suspension /tyres