Some time ago I replaced a phone to a new one using Android 7 (before it was 6) and my smart watch updated to Android Wear 2.0. Hard to tell what was the reason but since then each time a bluetooth connection between the devices is broken and going to be re-established there is a pairing request with a code which needs to be confirmed on both devices. Is there a way to make a phone and a watch to trust each other once and forever and to connect without re-asking a confirmation? This was the case with Android 6/Android Wear 1.1.
Not sure it matters, but the phone is Asus ZenFone AR and the watch: Casio WSD-F10.