I am indeed using the latest version (20170411).
Concerning the Bluetooth problems, I have confirmed it's the Low Energy devices that have problems. There is no problems on my Bluetooth 2 only speaker. I also tried a reset to factory defaults to no avail.
@Phil : do you have a BV7000 ? That adapter won't work. It's actually the metal part that's longer by 2 to 3mm. I tried a similar one lent by a friend, no dice.