Logic freezing when editing audio region lengths

If I'm editing a track by chopping it into 4 bar pieces and then time stretching each section to get the tempo constant I get a very strange bug. It will do the audio stretching fine, but as soon as I click the menu bar to save, the program freezes and sits on 50% CPU load indefinitely, not allowing me to do anything, meaning I then have to kill the process and lose my work. Anyone know what's going on or experience any similar issues?

Hello Caramby,
These audio files don't have buzzing or clicks in them, if they did the producer on session would have probably changed engineer lol. I'm cutting several files at once grouped in Logic: the DI feed, and the mics around the amp - so in total around 7 mono audio files. The buzzing sounds like a clocking issue rather than artefacts in the track as when I quit LP7 and reopen the audio and play it all the way through its fine - and I would also see any artefacts in the audio as I'm cutting pretty much to the sample, and then moving it to get it in time.
As you read in my original post, I can start editing and it be fine for 30 bars or worse and its 2 bars. When it happens and I press the Control+Shift keys (to fine tune the cut) and get the scrubbing sound of the audio, I get this clocking buzz...
The session was done in at a commercial studio ProTools 8 but our studio works mainly in Logic 7.2.x (with TDM hardware) as we find it a little easier to use (until we can get our hands on a stable version of PT8) So the audio needs to stay in LP7...
Hope this helps!

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