We had the same problem with our header.
Your dealer can get a sheet with how to change the holes the potentiometer is mounted in on each side to make it less sensitive (Assist Sheet). This helped alot.Then lower your header raise-lower speed numbers to take out the remaining bounce.
My 2020 35ft worked fine on last years 7010. This year on new 7120 and can't get sensitivity low enough to stop the pulsing. Dealer is still working on the problem, but not having any luck. There has to be more people having this problem than is mentioned on this board so far.
Any other help would be greatly appreciated. East central Indiana.