V-Vocal

This is kind of a problem and solution post.

When I use V-Vocal sometimes it causes the whole song to become "scrobbled" (thats my own term).  There is this loud interferance and distortion and crackling.  To stop I used to mix down the section i had been working on and it would stop but you can also stop it by doing a quick save and closing the project and then reopening and the sound has gone.

Hope this helps a few people.