I found the solution and thought I'd post it in case anyone else comes across this issue. I went into human playback and chose "custom," then I copied the parameters from "standard" and unchecked "...
Ah, I found the problem!! (and do I feel dumb!) I was hitting "generate parts" AFTER I made the new parts combining 2 staves into 2 extracted part, which then got rid of the "new" parts I was defin...
Half are rack-mount Proteus 2, Proteus FX, and Roland S-330. The Other half are on-board MOTU Symphonic instruments. I have done more careful testing and the problem happens when I have a whole not...