I still have to try wired instead of BT but that kind of defeats the purpose.
Here is what I have found with my Samsung 7100 series 4K TV.
(1) Be sure that the controller is fully charged before trying pairing.
(2) Turn off the TV then turn it back on before trying connection.
I spent a week trying to connect when at last I turned off the TV and when it powered back up the first thing I did was to pair the controller then things started working correctly.
The only question now is.. how do I turn off the controller to save its battery power when I leave the game network?