I was successful in running diagnostics with an advisor over chat and my phone turned up no issues. I’m seeing if I use the an Apple charger instead of my Anker yo charge the watch at night I don’t have this issue again... yet.
One of the questions the 'Genius' had in his script was confirmation that I only use the Apple Charger that came with my Series 3 - which I do. He went on to mention as an aside that they even don't want you to use Apple Series 1 or 2 chargers either. Tough crowd!