And i was thinking that's an issue with the rom itselfI had the same problem with my car. The bluetooth was well connected but no sound. I went to the developer options and chose the SBC bluetooth codecs. Everything is back in order.
I have not yet encountered any other problem on this ROM which I find very fluid and the battery holds up well (SOT 8h45)
Sorry for my poor english
Lol ! I flashed my rom two times found the same problem again and again so now i am on dot os again
Well sound is working fine in bt ? After your setup?