I added a 3rd Apple TV and can't get it to show up in the app. It is hard wired. The app says "make sure you are connected to the same wifi network". I unplugged the Ethernet and connected to wife and it still won't show up. If I had to guess I would say my issue stems from my wifi setup. I have the Luma system, they all bounce off each other but bounce back and forth from 2.4 to 5. Any tips?