I still have the small project it happened to me on. I gave up on it, but I'm the type that can't bring myself to delete anything so I still have it.
It consisted of 1 guitar, 1 bass, 1 kick, 1 snare, and 1 hi-hat.
I never could get the hi-hat to work. It would just not trigger on every other beat. The only thing I could do was to export the track in real time (not fast bounce) and select 'audible bounce'. Then it would work.
Sometimes it just happens ... :(
BTW ... quick OT question ... how do you like that HS10W Sub? I have a pair of the 80M's and was thinking of getting the matching sub.