Charge 3 sleep information inaccurate

[ValaDJ]

My Fitbit Charge 3 has recently started logging sleep incorrectly to not at all. This has now happened several times in last 2 weeks. When I check sleep in app (am using iPhone with OS 13.3), it sometimes logs 1-2 hours sleep or skips a whole night (no sleep at all) when I had a full nights sleep. The clock/time is correct on the watch and heart rate looks normal during the night in those instances.

Moderator edit: subject for clarity

[AlejandraFitbit]

It's great to welcome you, @ValaDJ.

If you are having problems with your sleep information, I recommend trying the following:

1. Make sure to not take off your tracker during the night.
2. Do you remember being awake during the night? If yes, that solves it! Keep in mind that if your tracker will detect if you are awake and will stop the sleep tracking process. If no, proceed to step three.
3. Restart the tracker. See instructions in the help article: How do I restart my Fitbit device?.
4. Confirm that the tracker is snug on your wrist (with an HR tracker, the lights shouldn't be visible).
5. Try sleeping with the tracker on your non-dominant hand.
6. If the setting was set to sensitive, please switch it to normal. 
7. If steps 1-6 do not solve the issue, I suggest manually editing the sleep log to reflect the time slept. See instructions in the article: How do I change my sleep history?.​

Let me know the outcome.