I have found the culprit, it's the edge browser, it's repeatable for me.
If I start the edge browser then play a game or do something like watch a movie, I will get the black screen issue, if I go back to the dash and physically exit edge by selecting exit in the context menu, the problem goes away immediately.
The only thing I can think of is that there is something running in the background while edge is minimised that's causing it to skip.
I have a video, it doesn't show the black screen though, it shows up as a skip, watch the timer in the top right jump a second at about 33 seconds.
https://onedrive.live.com/?id=530FE...00&group=0&parId=530FECBBDD53BC00!550&o=OneUp