My Xbox one has a HDMI to VGA adapter on rear output. Then a 15' VGA cable to Epson Powerlite 83+. It works great on gaming. When I play a bluray it flashes screen a second on then off continuously. If I hit home the whole screen flashes still not just preview window. If I change to 720p it does not do this.
The length isn't an issue as I've tried the adapter powered and unpowered. Also my bluray player in 1080p does not have this issue.