Maybe I’m not understanding. They don’t connect automatically. You would have to take some action on the Smart Connect. That’s normal.
If you are saying that you press the button to connect and they don’t connect unless you re-pair, that would not be normal. Pairing should be a one-time thing. Connecting would happen whenever both devices are powered on and you press the connect button.
Another thing, and I don’t know if it is the same with Rexton, but with my Resounds, sometimes the batteries in the hearing aid are near the end and they will not connect or stay connected with a streamer (Phone clip+ or TV transmitter). They will drop out of that connection but will still run the mics on the hearing aid. So if that happens it can give you the impression the connection is dropping when it is really just the hearing aids batteries getting low.