Restrict Bluetooth connections to BluOS device?

I couldn’t figure out why my Powernode 2i kept cutting off playing this morning, until I started to hear Windows chimes through it and then heard one side of somebody’s conference call. Apparently a neighbor has confused my stereo with their VOIP headset!

I switched the Powernode to require manual switching to Bluetooth input, and this fixes the unexpected switching, but I don’t love the idea of any source being able to connect. Anybody know if BluOS has a feature somewhere that lets me disconnect sources or otherwise manage those incoming connections? I don’t see it anywhere obvious either on the app or in their help pages, thought maybe one of you all may have some idea.