"No network detected" on Apple TV 4K
I set the WiFi to just ONE network name and not different names for 2.4 & 5GHZ. After doing this, the issues with the network being lost stopped completely. I never had this issue with my non 4K Appltv, but this certainly solved the issue for me, for now. So just to recap, DO NOT broadcast 2 different names for the 2 networks, this will allow the Gateway to sort out the best connection at any time.