With the Koni damper settings, the adj range is non linear; I find the last 1/4 turn makes a huge difference in the rebound damping and that would cause jacking down problems ie the spring cant extend fast enough to give you the travel you need for the next bump. With full firm setting on my eg and on 7.5kg spring it was causing jacking down problem at the rear so if you have say 4-5kg spring I anything more than 1/2 turn from firm is a bit much.

Best to trial an error to your taste, and why not softening the damping one end at a time till it feels floaty and then wind it back up 1/4-1/2 turn.