I'm not sure if this would apply to any other device and bt dongles
But if you want to have a solid connect/ a connection at all you have to revert pulseaudio back to 11.1. And use have to use a sbc-1 version compiled with glibc-2.25 or lower. But I only tried with 2.25. It would be interesting to tests this out but I really can't but if you have the chromebook this would be helpful to know.

found tim e to install slackware current.

it looks like the small library libsbc is still showing a2dp unavailable.

i see to bbump this thread as it is still working
since i have my original txz sbc... and without recompiling it.
then since the device didnt show in pulseaudio 13 (and was playing the audio in bt speaker with no gui adjustment or presence in pulse) i recompile pulseaudio
then installpkg libsbc-1.3-1.txz and it is working on slackwarearm

https://bugs.debian.org/cgi-bin/bugr...cgi?bug=856487

i think this was isolated pretty sure

the updated packages should work pretty well actually.