Hello, I'm trialing the software. I have rendered several test clips (mostly using Dry Clean on film) with good results. However, the past 2 clips I've tested have developed a strange stuttering in the render. Project framerate is correct (24fps), but the playback will suddenly skip back several seconds and replay an already-rendered section, then jump ahead. This happens on both the render and on playback. I don't think I've changed any settings but would appreciate any thoughts. Thanks so much.