I have selected Hi-Res Output and it defaults to Speaker as Active selection instead of Bluetooth is what I meant to say, not stereo. If I disable Speaker in the Hi-Res output it picks OpenSL ES output which I'm assuming is the default, and in there too it defaults to Speaker instead of Bluetooth. So far what all I've tried it never picks Bluetooth in any of the Audio Outputs, it's always Speaker as active.
That's what I found strange since I'm connecting to Android Auto through Bluetooth.