Still no wiser to the solution. At the moment I have to turn off Bluetooth before sleep or shut down and then turn on again once booted. Only then will the volume and internal audio work as expected. I hoped the latest update would fixit but still stuck, grrrr
Same problem for my MBP 17 (2011). Only solution for me is to turn Bluetooth off/on before shutdown/boot. All other workarounds described in various threads don't work for me. Come on, Apple, fix it as soon as possible!