So no software solution for you ?
I might be misunderstanding the problem, but I don't think this is a software bug. I have the latest H9 software — 4.8.0 — installed on an H9, and the clicking the big wheel switches the right footswitch from incrementing to decrementing and back again. What's odd is that the clicking the big wheel seems to work fine for you when you're doing other things. You've pressed the preset switch before trying to do this, correct? B/c clicking the big wheel will do something else if any of the other switches are enabled (HotKnob, X, Y, or Z).