If it is a limitation of Windows, I am sure there is a workaround. (It is the beauty of PC, as opposed closed system of Mac)
What if I install midi yoke and create a virtual midi port , make SS host app send data to that yoke port, and select that same port in H9 control. Would it work?
The thign is that I use SS to control other devices too, so I’d need to install Midi-ox to route midi data from yoke port to Um-one. That means I need to run 4 apps, and stability may be an issue.