Yep, same here. It’s been stable and working great then it quit. I did a device scan and it found a speaker that it already had previously found and named it “Samsung Wireless Audio”. I changed the name to “Samsung Wireless Audio added” because I had no idea which one of my 8 speakers it was. Still had no control of any speakers. Just this morning I jumped into the Multiroom app and my Upstairs speaker had been renamed to “Samsung Wireless Audio added“. Somehow, Smartthings has renamed my speaker.