Interesting. Mine won't even come up at all now... it just times out with ""Error initializing Bluetooth - Call Service""
I noticed it 3-4 days after getting the SW upgrade, which I think was the first time I tried a call, so timing is interesting. Especially as it would seem odd for a BT hardware failure to also affect voice commands, which doesn't depend on having anything connected via BT.
that was the first sign for my mcu failing due to Emmc. Within a couple of weeks it was dead. Sorry.