The same issue was happening to me. I ended up changing the display port cable supplied with the monitor to another. The cable change stopped the flickering when I moved my chair away from my desk. Hope this solution helps.
I checked behind computer and discovered that my dp cable was in contact with the monitor power transformer (which is on desk). The cable has been moved away from transformer and issue has stopped. I assume there must be some electrical interference ...
I am having the same issue as opening post. When I move my chair about the screen flickers on and off. I have not tried changing DP Cable as yet but I am wondering if problem is related to static or electrical grounding. When I use a different lighte...