Apple TV is a great media device that can deliver wireless lossless audio to a Lemus device as well. Make sure the Apple TV is from 2015 or later for best operation.
Check if the sound setting in Apple TV is set to surround sound 5.1. change audio signal to stereo PCM.
Select "English Original" in language options in the Netflix app as well. (Normally set on English 5.1 or 7.1)
Refer to our setup guide for box connection here to ensure that your Apple TV and Lemus unit is correctly connected to your TV
Make sure the Lemus device is connected to the same Wi-Fi. and that the router and router firewall is of high standards. If you know the Lemus is well connected, reboot your router and wait 3 minutes. If this solves the matter. The issue is router related.