I have bought it & connected it. (Philips hue sync to Arcana from Arcana to Sonos Arc & TV) With Swisscom TV it works but with Apple TV the picture keeps switching on & off (when I have selected 4K60Hz) with 1080p I don't have this problem. What could be the problem? Is there anything I can adjust on the device? I think the HDMI cables should be good.