The answers to all your questions is NO. No filters, no scaling native timeline using EX 720/30 frame setting. Can’t figure this out. The next day it did three sequences perfect then started up again. I exported the timelines and also even changed the compressor preset. That helped but the problem was still there very slightly. I have never had this problem before and have been using these same settings for over two years. Could static electricity do this?
Apple Certified Master Pro FCS 2
Sony EX-3
MacBook Pro