Also very subjective to the satellite rx you use, or just RXes in general. I have found genuine spektrum products bind easier, but after a few tries all the aftermarket units I have tried (ORX, Lemon, Redcon, Knock offs, etc.) have worked.
Another solution to this is to have a regular RX to bind alongside the Aura 5. I had a similar problem with my RMRC stabilizer in my mini recruit. All I did was plug the satellite into the main 6ch RX and bind it to my model, then unplug the sat and plug it into the board. Didn’t seem like it would work on paper but worked like a charm!