I guess so, I never had such an elaborate setup. But by bypassing the control surface you should at least be able to find out if the Eb3 is in fact assigned to a controller. Maybe it'll suffice to go through the zones only?
To be honest, I never fully understood how zones and modes work (or don't), as it is such a thing that only becomes clear when you actually use it, and I rarely use controllers other than those I might need on one live track, so it is "no zone" for me.
I also don't know if you need to have the zone or the mode or either or both selected in order for the pressed key to automatically lead you there.
It also seems to me that only the active zone or mode would hijack the notes assigned to it, but again: not sure.
It would indeed be rather a Herculean task to have to go through all those zones and modes. So: try bypassing first, just to make sure it is in fact assigned and active.
