I am unable to duplicate this (No pun intended) is it MIDI or audio you are duplicating, if MIDIis there any particular MIDI messages in the file i need to mimic other than just notes ?
MIDI, only anomaly I can think of is pitch bend assigned to the modwheel, but I think that I was also crashing when just simple rhythm pad patterns were duplicated.
It was working at the start of the session but by the end, 100% of attempts to duplicate would cause a crash.
I'll keep an eye on it in future and report back in more detail next time!
If you still have the session and it is still doing it, i suspect Intua would like to take a look at it if they can