I have this problem with someone's desktop keep connecting via bluetooth while using HDMI ARC. I solved it via factory reset the MS650 soundbar. (So it won't remember the DESKTOP anymore).
To do it, I can't remember exactly which buttons to do factory reset(there are only few buttons there). But, it is pressing one or two buttons on the right side of the sound bar for 5-10 sec.

Just to share another problem I have with MS650. I am using soundbar HDMI ARC to connect to Samsung MU series TV. However, I faced stability problem. Sometimes, it stays at DIN instead of HDMI ARC.
To solve this, it was caused by the other HDMI cable from TV -> Media Player. I changed the HDMI cable from TV -> Soundbar , to Soundbar -> Media Player. It's all solid stable now.

This post has been edited by ryws: Jun 6 2018, 02:01 PM

Has Soundbars Improved to Usable Levels?

IMO,
I was using Sony DAV-DZ840K Home Theater 5.1 and changed to Samsung MS650.
As a comparison, the Sony DAV-DZ840K Home Theater 5.1 is far more superior than Samsung MS650, especially playing movies.
These two devices are about the same price.

MS650 does perform well in stereo music.

SWA-W700 price is super high. No other cheaper version to pair with.
And, the SWA-9000S rear speakers is not for sale in malaysia.