Here's my results. Before changing any settings, I tried PA with AA in another vehicle and it worked fine. Where it worked is connected to an aftermarket Sony head unit XAV-AX5000. I then went back to where it failed, my Ford Fusion Sync 3 head unit with AA support, and it still only played audio through the earpiece speaker. I disconnected, disabled Hi-Res for BT, tested again and now it works. Just to confirm, I re-enabled Hi-Res for BT and tested again and the problem returned. Switched it back to disabled and I'm all good. Looks like that was the fix! Interesting that it occurred o