An update: I got BalenaSound working on the Raspberry Pi 3 and was able to use to play sound over bluetooth several times, even through multiple reboots. However, now I am having the same issue as before in that I am no longer able to connect to the Raspberry Pi over bluetooth. I have not changed anything in the OS since I originally installed it, nor have I done anything different in my startup and shutdown sequences in regards to the Pi. It was working perfectly yesterday, and now it's not. Any help would be appreciated, however since something that is marketed to be easy to use and setup is in reality useless and extremely difficult to even attempt to setup and work, I'll probably be moving on to other services to try to get this working.

I'm increasingly frustrated at the supervisor not starting as well. I've tried re-flashing current and older versions of balenaOS, both dev and production branches...nada. And what really burns me is that this is the 3rd instance I'm trying to get going since May of this year, the 2nd happening in early July, and they had no problem. Now with whatever change to balenacloud, something breaks in this regard. @tmigone has said starting this month he'll turn his attention to balena sound, and I hope he's at it in earnest.