Apple

It’s not even about it not auto detecting. The sleep tracking is completely inaccurate. My watch has bedtime mode automatically set at a certain time. Well I just so happen to be working 3rd shift. I’m busting my butt during this shift and it was quite literally one of the busiest shifts I had… it gave me a ton of sleep data but ALSO had all my stand rings closed (which it should cause I was on my feet the whole time) but how can I be sleep AND closing my rings? I literally was never sleep.

Point is, as long as your watch is in sleep focus… it tracks anything you’re doing as sleep. Once I learned that I genuinely stopped wearing it to bed in its entirety.