ViaSwiss

I have not had this issue anymore after switching from Frontier FIOS internet and TV to Comcast (gross) internet and Playstation Vue TV.

Hi there, I had same issue with occasional connectivity loss between my OLED65B6P and LAS465B bar. Every few minutes, intermittently I'd lose sound for a second, or two. I replaced that thin cheapie optical cable that came with sound bar and used my old, fat Belkin optical cable. Over two hours of TV watching, not a single drop out. 

I think that thin cable is not insulated well, or maybe has low optical quality fiber in it, same as fishing line:)

Anyways, hope this helps. 

This is great. Please let me know if it continues to work.

One thing I can say is that I only have this issue when watching cable/TV. When I play Playstation or plug a USB in to watch a movie I do not have the sound issue.

Interestingly enough I used to have this issue a lot, but can't recall it happening for several months now. I'm using the lg650lb with the N3540 sound bar. Only two things I can think of thane have changed, bought a couple of powerline adaptors so my to is now connected via Ethernet rather than wifi, and also there have been several updates to the to since I last recall it happening.

For people it is still happening to, what happens if you turn off wifi on your television (regardless of how it's connected to the sound bar)?

Tried it tonight and it did not work.

I too am having same issues with intermittent dropping off of the sound volume.  I am using a new LG OLED 55B6V TV with Orbitsound A70 soundbar.   Both (top of range?) items newly purchased.  Connecting using recommended optical cable.   The sound seems to drops randomly for a few seconds and then recovers to the correct volume level.   Orbitsound support tell me the issue is with the LG TV?  Not sure where the issue is but it would appreciate LG helping to resolve with the Soundbar suppliers.    

I don't think its an issues specific to the TV since I am using a Sony TV with LG soundbar. Have you tried connecting the HDMI to HDMI for sound? Maybe its just an optical cable issue with LG devices?

I have a new Sony TV and new LG Soundbar. I have the intermittent cut outs with my soundbar as well. I am using an optical cable so I do not think its a connectivity issue. Not sure what else to do.