Sleep log never starts at the correct time-Charge 3

[ciesco]

I used my Fitbit Charge 3 quite a bit after buying it in early 2020. After a (long...) break, I resumed using it a few months back (though with a different phone, an iPhone 12 mini) and since then I've been having a recurrent problem. This problem is really bothersome because sleep tracking is like my primary use for the tracker, and I just don't have the patience to edit the log every day. Plus, as you can read below... the tracker seems to actually know when I fell asleep so it's even more frustrating:

Pretty much every night with only a handful of exceptions, the recorded "start time" for my sleep is far past my actual sleeping time (by as little as 45 min and often as much as 2h). I tweaked various parameters (dominant arm, sensitivity) and reset the tracker countless times as advised in similar sounding posts in this forum to no avail.

But here's where it gets weird and I really wish I understood what's going on: the tracker seems to perfectly know when I fell asleep. The tracker (or the app? I don't know where is the "start time" automatically set) sets a time but if you look at the sleep stage plot, it'll start in "Light sleep". On the app, if I change manually to an earlier time I know to be before I fell asleep, you get to see "Awake" followed by "Light sleep" at about the right time (meaning 45 minutes to 2 hours before the automatically detected "start time").

So the sleep stages detection works very well(?!), but the tracker (or the app) still sets a start time at a seemingly random later time... Anybody knows what may be going on? Is the app or the tracker messing up? Why can't it just set the start time when it already knows I went from awake to light sleep?

I hope somebody can help me find a solution, or at the very least an explanation for this strange behavior. Thanks so much in advance! 😊

Moderator edit: updated subject for clarity

[EdsonFitbit]

Welcome to the Fitbit Community, @ciesco.

I'm sorry to hear about the difficulties you experienced with your Fitbit Charge 3. Thank you for trying to get them resolved before contacting us.

In addition to the troubleshooting steps you performed I would recommend setting up your Tracker as a replacement device:

1. Tap the Today tab , and tap your profile picture.
2. Tap Set Up a Device.
3. Choose your device and follow the on-screen instructions to continue.

If you continue having the same issue, the best way to get help for this problem is to chat with us online or give us a call. Please click here to get connected.

Have a nice day.