Well, All you people having issue with dropping sound and come back after while. It's not issue with Tv, or router or cable or anything else.
It's stupid LG way of soundbar software setup. Even though you are connected to TV with optical or HDMI cable, issue still persist, due to
stupid soundbar wants to connect to internet wifi or LAN time to time. while attempting to connect, it drops sound and after unsuccessful
attempt, came back to normal sound until next attempt. It's no way to disable this and it's so stupid.
MAKW SURE YOUR LG IS CONNECTED TO WIFI/LAN, AND HAVE INTERNET CONNECTION. IT WILL BE HAPPY.
STUPID LG.