So I got this watch over the weekend and didn't charge it until after it was drained because I thought "Battery life best practices" (I was surprised that 33% lasted me 10.5 hours). I then upgraded to watchOS 6.1 and left it charging overnight and now I see the battery low symbol (ever since I unplugged it but it's now at 87% as you can see in the complication) although it disappears and reappears after a while. This is my first smart wearable so I'm still learning the How-Tos.