If you have a blueox check the tow bars. The levers can be up in the lock position but not be completely locked in. Happened to me affected my steering on MH. After 6 repair shops later for looking at front end drifting problems on MH found out it was the one tow bar not locking completely and swinging the MH when driving.
Again the levers 'where' up and 'appeared' locked. You can take off a part and look inside and see that it is not fully engaged but enough to send the lever up. And enough to move to affect the handling on the MH. Blue Ox replaced my whole tow bar for free.