Beam: Keeps switching back to ARC from Bluetooth - how to stop?

I did and it worked fine, but honestly for me its not the best “solution”. As you know eARC gives you better audio quality, and lets see an example: 

I use my headphone and if I would like to swith from headphones back to the soundbar its automatically turn on the simplink again, which means I have to do the same settings again if I would like to use my headphone ----- go to HDMI settings turn off simplink and after that, I will be able to change my audio output--- and it is so elaborate. Tried with LG soundbar and it is worked perfectly, nothing has had to be changed.

By the way thanks for your time and advice but I sent it back, that is not how it’s supposed to work. Nobody could say if this is an LG or Sonos software bug, because it is a bug 

I have a LG C2 TV with Arc bought last week, and the same problem here. I am not able to turn off the simplelink while my Arc is connected via eARC port, its automatically switch back on. Its only works when disable eArc function on the TV an after I was able to turn off the HDMi-CEC function. For me it’s a big disappointment.

LG suggestion was to have the Arc connected via Optical port and will have no problem but for me it’s just meh… Atmos is not supported via optical port, but if I keep the Arc I have to accept that I wont be able to use for example Bluetooth headphone or etc.. nonsense :(. Actually it is related just with Lg C2 and Arc so its model related within a brand...

Hi there - 

Also, a very simple solution I discovered: make sure eARC is turned on. Was having the same issue with my LG/Sonos ARC after I unplugged and restarted some things. I noticed eARC was turned off and when I turned it back on, it stopped switching from Bluetooth to Soundbar.
 

Steps on LG TV: All Settings > Sound > Additional Settings > Turn on eARC at the bottom.

Then Sound Out > Bluetooth.

Should stick. Hopefully works for you too!

I am amaized that 3+ years and sonos could not connect their own product to a tv and try to replicate this, to see the issue themselves? I had my same experience and i imagine others will continue to have it! All smart tv pwners will see how bad sonos products are due to this 1 bug! Unless they dont set up another audio output.

Supplementation.
If you wish to return to the sonos soundbar, please reverse this procedure.
When ARC is selected, Simple Link is automatically turned on.
This is probably because there are frequent problems with no sound if it is left off, so it is necessary to turn on the path so that there are no problems with manual connection in any home.
I am Japanese and not affiliated with LG or Sonos, but I would like to try the IKEA rear speakers from now on.

regards.

Yeah same here. This is a ridiculous issue. My previous soundbar didn’t have this issue, and I am considering returning my Beam.

the solution is also not working in my C1, CEC is immediately turned back on automatically by the Beam.

any other solutions out there?

this one:

https://www.amazon.com/BlueRigger-HDMI-CEC-Less-Adapter/dp/B07BFL8TM8

but this one is also advised as alternative:

https://www.amazon.com/Lindy-HDMI-Adapter-Female-41232/dp/B00DL48KVI

Sonos is acting like a web browser: it wants to be the default sound output. 
 

I found a simple solution: I returned it to Costco.

I have 3 Samsung TVs, one with Arc, one with Amp, one with Beam. All have the problem, if I select a Bluetooth headphone or TV speakers, they revert back to Sonos within 2 seconds.

it is terrible, Sonos, if you cannot fix it, it would be appreciated that you write why in this thread 🙏

Had the same issues here - Sonos beam (GEN1) connected to OLED LG G2 with HDMI ARC, well recognized by the TV.

1. When connecting Bluetooth device (e.g. Apple Airpods Pro), it switches back to BEAM after a couple of seconds. Same when selecting the TV speakers, it switches back to BEAM automatically.
   ==> could not find any better alternative/solution than to turn off the CEC/Simplink in the TV settings to prevent the BEAM from taking control over the other audio devices/tv speakers.
   Not optimal solution though (because it forces you to change some TV settings before switching from BEAM to bluetooth device), but I can live with it.

2. When connecting other HDMI devices (e.g. satellite box) to the TV, it switched back to TV speakers. When selecting back again the BEAM as audio output, no sound coming out from the BEAM.
   Seems to be a conflict in HDMI ports, due to the CEC thing.
   I purchased a CEC less adapter on Amazon, connected it to the satellite box, and now it all works perfectly.

Obviously when buying these products (TV, soundbars, etc...) you don’t expect to encounter these kind of issues (I spent quite some time reading forums, also discussed over the phone with LG customer service, etc...), and you expect the manufacturers to solve this (be it TV manuf, Sound device manuf… I don’t care).
But in the end there are some workarounds that can be found.

Still, hope this helps for those who are still having issues.

Maybe try first toggling off CEC (AnyNet+) on the TV, that usually allows a user to then switch inputs.

Stumbled across this thread when trying to do the same as everyone else - use some bluetooth speakers so as not to disturb the wife.    And now I understand what is happening, and noting that this has been around for several years, wondered why no-one has suggested another solution that I have been pleading for Sonos to do for even more years - have some wireless headphones that are another Sonos node?    Using a Connect /Port to provide that functionality is completely expensive overkill and still not seamless.   Since most of my Music is played now via Sonos (although I do play my Vinyl direct) everytime I want to use headphones its a faff, and now it seems also if I want to watch someting on TV via Headphones.   wake up someone at Sonos, there have been rumours but nothing yet….

Thank you. Anynet+ is Samsung speak for HDMI-CEC. The solution you found has been mentioned before.