I have a weird sync problem in ableton. I record a jam, say massive and alchemy and some drums, when I playback it sounds fine, as I recorded it, but sometimes one of the elements, usually massive, is out of sync and/or playing something completely different to what I recorded. I have tried the retrigger in massive (or enable Restart via Gate in the oscillator tab) to no avail.

Ive stripped these down to just two sounds to illustrate.

This is what it should sound like, and does in older versions :

Right - Clyp

and this is what is happening :

wrong - Clyp


Any ideas what might be causing this?