I want to post my feedback.
With the latest Beta „Version Beta-170411 / v1.0.2 based on v1.8.4-726“ I got my Bluetooth Box playing from the Raspberry with max2play and the LMS.
So I don`t know how you fixed it, but right now it is working when using the Pulse player.
Confusing is, that you write something from „Pulse Bluetooth“ but in the player settings, never the word „Bluetooth“ is displayed,…
next try will be to play music via Bluetooth from the Handy to Player 😉