so, at this point I don't understand why the tracker isn't working.
it is sending updates all night, that's working just fine, but those updates are always flagging me as awake. as if my watch wasn't detecting that I fell asleep.
@kitten it is also possible they calculate it afterwards, when you're awake.
I once looked into sleep tracking for the PineTime, it's actually very difficult to do and most good algorithms are proprietary. Could be they have some fancy post processing.