It actually looks like neither the Zone MIDI channels or the Zone Low - High range settings work at all.
Do it work for you?
MIDI channel settings do work for the individual notes.
I think Arturia shall take a look at this if they havent allready. The voice and zone settings need some attention.
That aside then when using multies you can set each patch in the multi to use pitchbend or not in page 2. I know that's not the same, but for some things it might be enough. Perhaps you allready know this.