I had a few issues start to pile up, most annoying of which were:-
So I factory reset the watch and re-paired and restored from the backup (on the iPhone app).
Everything works 100% now - audio is back (I changed nothing and now the sounds are back) and Siri is reliable again.
Just a suggestion if the watch isn't behaving itself - restore takes about 30 minutes all in.
- No sound from watch notifications (I was sure I had checked all the correct options)
- Siri not activating (Hey Siri or long press on crown did nothing)
So I factory reset the watch and re-paired and restored from the backup (on the iPhone app).
Everything works 100% now - audio is back (I changed nothing and now the sounds are back) and Siri is reliable again.
Just a suggestion if the watch isn't behaving itself - restore takes about 30 minutes all in.