I've had similar issues with Bose QC35 on Windows. Currently they work -- but the settings are on a knife-edge: all it takes is an unlucky Windows update and I'

I've had similar issues with Bose QC35 on Windows. Currently they work -- but the settings are on a knife-edge: all it takes is an unlucky Windows update and I'll spend half a day trying to find the right services and settings to reset/reinstall to get it paired again. (Also, whenever I restart, I have to open the bluetooth troubleshooter to get them paired, though at least that always works.) I blame both Windows and Bose equally, but I also think it's a very difficult protocol to work with.