Charge 3 sleep information inaccurate

[Chark0325]

My charge 3 is mostly doing a great job.  But at least once a week it doesn't record one part of my sleep.  I wake up sometimes in the middle of the night and may be awake for awhile. Most of the time it shows that time as awake.  But once a week it just doesn't show the first part of the night so it is just blank.  

I have difficulty sleeping so getting accurate information is important to me.  And I don't like to guess about when I fell asleep because I am not sure.  I like the charge 3 because it is not very big so I don't really want a different device.

Moderator Edit: Clarified subject

[AlejandraFitbit]

Welcome to the Community, @Chark0325.

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 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 edit my sleep history in the Fitbit app?.​

Let me know the outcome.