I'm using an LG GPad 8.3 (v500) with CyanogenMod 12.1-20151007 and on this device only the "owner" is able to activate Bluetooth. There was a similar bug in CyanogenMod 10.1.
Is there a workaround to allow other users than the own to use Bluetooth? It would be ok, to create another "owner", but this seems to be impossible.