Midi Pitch Bend wierdness

I have MainStage hooked up to a MOTU 828mkII and an Oxygen61 keyboard. When I play software instruments it works fine. When I create a channel strip with external instruments it freaks out whenever I use pitch bend. Example: I have a Yamaha Motif XS rack plugged into the MIDI out on the MOTU. When I define this instrument in the channel strip and play I hear all the notes just fine. I apply pitch bend and can hear no difference in sound until I get to the top of the PB range then the sound suddenly jumps an octave. Releasing PB brings the sound down but not to the original note. It's off by a second and I have to cycle the power on the synth to get it back to normal pitch. I've tried this with different MIDI interfaces, synths, and controllers and still the same effect. This appears to be a pretty serious bug and I haven't found any way around it.

Anyone else have this problem?