Mee too, exactly the same. I tested right now. Starting BT from upper menu shows ON, entering Settings/Bluetooth leads to an empty screen with nothing. To turn BT off again in upper menu I had to restart GUI with SF ulilities.
I followed @piggz hint:
I better fix, is to edit /etc/connman/main.conf, and add ifb to the list of blacklisted devices, like
NetworkInterfaceBlacklist = p2p,usb,rmnet,rev_rmnet,ifb
and added the ifb at the end, this was easy and mobile data is working fine now.