We have a couple Yamaha MO6 boards
The problem; the synths seem to respond to the first patch change message, but not subsequent ones.
At first I thought it was a PT/RB issue, but the Roland synths don't seem to have this issue.

Troubleshooting steps taken so far:
-Hit Play, which sends first message (works), let song play, sends second message (fail)
-Change first message to be the same data as the second message, to eliminate error on our part of sending errant message (initial change message sends, data is good, but subsequent changes fail)
-Use Event list to manually send the message changes (success)
-Hit play again (first change works, second fails)

Is there some quirk, or necessary order of events to change a patch in Yamaha synths?
Like I said, the Roland (and other MIDI devices) behave as expected, but these Yamaha MO6 synths do not.
Not sure if it is something I am doing wrong communicating with the Yamahas (it's all I can think of besides defect/config issue)

/sign me confused
//I've done this stuff for a lot of years, but these two synths seem to be unique
///Maybe it's just this particular model?

Sending MSB/LSB/Patch data .. tried experimenting with timing (in case we were sending it all to fast) but consistent fail on second patch change as well as third or fourth.
Any ideas?

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