I am getting 3 mails so far with your reply, but they do not show up in this thread. I am not mistaken, I am talking about the HotSwitch, not the HotKnob! The HotSwitch is only briefly mentioned once in the manual, no mentioning of how to set and/or undo. The algorithm guide tells you how to set the HotSwitch, not how to undo its action.
Once the HotSwitch is set it has a life of its own if you try to undo its settings. This is why an action in the H9 and H9 Control would be very handy to get rid of this strange behaviour.