Working on a DJ set tonight and I started running into a problem that I've seen a few people mention, but haven't been able to replicate previously. Using Complex Pro on all my clips, but only playing two at most at any one time. Sometimes launching (or stopping) a clip will cause an audible click in Live's audio, or the sound drops out altogether for a second. CPU never goes above 10%. Changing the soundcard buffer settings has no effect.
What's weird is that I was prepping and practicing this set for two days with no issues at all, and for some reason tonight it's happening constantly. Changing all the clips to Complex solves the problem instantly, seems only to be Complex Pro. Happens not only when I launch a new clip, but also when I click on an interface element like a track fader, or track on/off button. Not 100% reproducible every click, but happens at least 50% of the time now.
10.6.2, RME FF400 with latest drivers.