Had the same question on a similar behavior, but I’m assuming the issue here is the same.
So yeah that’s just how OFS internally saves the funscript, if it is something else causing the behavior i have no idea what is causing it, to this day i can’t solve it so i kind of just live with the result at this point
It could also be because of the native FPS of the video itself if that is happening horizontally and not vertically, in my case, the error is more on the vertical shift, not a horizontal one, so converting the video to I-frames might help or solve the issue, maybe, I’m not entirely sure but you can try.
