[Deprecated] [TESTING] Bluetooth audio streaming (A2DP)

After a recent release and providing support to RPi’s onboard Bluetooth chip I was trying to stream audio to a bluetooth speaker (Philips OTR 7500). I was able to find the device, pair & connect to it but after few seconds it keeps disconnecting. This is probably the same problem as @ytandogan described in https://discourse.osmc.tv/t/raspberry-pi-3-bluetooth-mega-thread/13977

In journalctl I saw some errors:
Suspend: Connection timed out (110)
Abort: Connection timed out (110)

Any ideas?