Have you already tried if you have the problem again? with the new firmware? if yes maybe it wille be usefull if you can make a movie about it for pioneer.
I ordered one coming wednesday the RX but maybe it has been fixed.
Ofcouse will be nice that it will be fixed for you if it is a issue becouse i also play long gigs around 5 sometimes evne 9 hours dont want this happen to me either.