#1 I am not sure what you mean by security settings. Do you mean on the device? I don’t know what settings that would be, but both of the devices that I can’t get the bluetooth addon to see are able to connect to my bluetooth headset and my bluetooth speakers. I also tried to connect them to my phone and they are able to connect to that.
#2 I am streaming from my phone to the LMS server, using the link in favourites to stream. The connection does not drop and the phone continues to play, there is just no audio until I drop the connection and reconnect.