I'm using Premiere Pro 2014.2 on Windows 7. I have a sequence which I want to edit. So I'm copying a part of it, and pasting copied clip on the same track. And in the pasted clip I losing some frames, it shows just black screen instead of my video. But the original clip, the part which I copied, is totally fine. No matter which copy/paste technique I'm using (Razor - Ctrl+C - Ctrl+V, alt+drag, setting I and O then Ctrl+C - Ctrl+V) I'm always getting the same, some black frames in the copied part. What I'm doing wrong?