I’m finding the same as Abhishek_Kumar. Tried RPi B and Zero, 3 different BT dongles (which have A2DP support) and Android tablet and Android phone. Can always pair and tablet or phone shows osmc as connected for media. But when I play audio file on phone or tablet no sound from anywhere. Volume rocker on phone or tablet shows it adjusting Bluetooth but even at maximum, nothing from OSMC (latest available version).