I notice that XZ Premium under Android 8 refuses to "remember" the 100% media volume setting. Every time I connect it to [the same] Bluetooth A2DP device, the media volume setting jumps back to somewhere around 50-60%.
My regular XZ under Android 7 does not exhibit this behavior: it I set BT media volume to 100% it will rememeber this setting and stay 100% every time I reconnect.
So, what is causing XZ Premium to reduce the volume: is it caused by Android 8? Or is it something Sony changed in XZ Premium?
