I have been trying to use my bluetooth headphones ( sony mdr-zx770bn ) with my raspberry pi 3 for a while now (onboard bluetooth), and it's easy to get working with either OSMC, the latest openELEC beta or the latest LibreELEC build (I just took the file from the downloads page) but it always stops working after a while (20 minutes the last time I tried it). I have to completely disable the bluetooth audio out (set output to hdmi, disable bluetooth) and then reboot, set it up again (bluetooth on, connect to headphones, change to Pulseaudio bluetooth) to make it work again for some time (in my anectodal evidence the time it worked the second time was significantly shorter, I believe 10 minutes). I can provide logs if you tell me how to.
Also, what is going on with openELEC and LibreELEC? I don't get it, is openelec dead? Is it true all the developers moved over here? And why?