I also have the suspicion that the culprit is pulseaudio. As long as audio is set to HDMI the bluetooth connection is stable. As I switch to pulseaduio and move the cursor for the first time (the first sound should go through the BT connection) it immediately disconnects.
same here. reading through the log file i see something related to pulseaudio output a failure code. also it says something in my music.tdb is unsupported. ill look more into it today.