I edit on the fly as it plays. Sometimes selecting each multicamera view starts to make the edit selection back where the vertical line is where the play started rather than where the play curser bar is. It shows OK in the window where I'm selecting, but the changes only toggle the one location back and forth. It seems to happen more often if I have gone back and delete a prior change by using the "gp back" arrows at the top of the screen. I've had this in all the versions of Pro 10