This is a new problem and im not sure if this is an issue with netflix or with the recent firmware (1260.8) that has an issue with netflix, or if something is wrong with my tv. When I use netflix from any source (apple tv, native app, windows 10 app, windows 10 edge browser) and watch netflix hdr titles I get screen flashing, macro blokcing artifacts, repated frames stutter. I don't seem to have this issue with amazon prime HDR titles, or with my HTPC for HDR movies and games. I have recorded the issue and posted them on youtube. Here are the videos:
It's way more severe for me when im in game mode. Some of these captures are when game mode is active because I have my apple tv and nintendo switch hooked up to my receiver. I have to mannualy switch back to game mode off if I use my apple tv.