I have TRIED to like watchOS 10. Hell, I was pretty excited for new features, but it’s been a massive disappointment. I don’t use the widgets at all, since I already have everything I want on my watch face. The control center was great where it was, and the Digital Crown and side buttons have been completely changed. I can’t double press on the crown to return to my previous app, which I used multiple times a day. Now I have to use the dock to return to my last app, which adds extra steps. Apple Watch was great because of how efficient it was to use, but WatchOS 10 has made added so many steps to any action. I’m really hoping Apple will give us the option for this new UI or the old one, because it sucks.
This I believe is because it’s set to use the media player without the phone. They figure if you have the phone you’d use it over the watch. I have zero issues when I leave the phone behind. I’m assuming you mean from the watch over BT as it doesn’t play just on the watch ever.