I posted about this several weeks ago when I started experiencing the same issue. First let me say that I've had an Edge for about 8 months, but it only started doing this last month. Right after the latest update. I personally think it was that update that caused this and I have hope it will go away within an update or two. Second, I "fixed" most of the problem by going into setting and turning HDR (I think it is called HDR) off. Other people have described on this forum seeing benefit from turning other setting off or down. Let me say I agree with critics that say you shouldn't have to disable your box to get it to run correctly, I understand. But regardless, that is what I did and it mostly helped. It went from practically unusable to merely annoying. My fingers are cross that the software engineers have seen (or heard complaints) about this issue and it will be fixed in the next software update. I hope this helps.