Mid 20kts some gusts lots of chop.
As I approached near planning speed and hit some larger chop the foil held the board up and skimmed the chop then sort of missed a couple. It was then that I felt the instinct to move feet out to take pressure of my ankles in controlling the board roll. Then this distraction had me belt into next chop kill speed and start again.
I did have a large number of catapults powering up and thought the drag on the foil was the reason and needed some adaptation of technique.