Charge 3 not registering sleep

[Zella723]

At least once a week my Charge 3 completely fails to collect any sleep data. Or as an alternative it stops collecting data when I get up to go to the bathroom. This past Sunday I wore the Fitbit to bed as always, slept well and still nothing showed up when I synced and refreshed.  Last night it stopped recording any sleep when I got up to use the bathroom at 2:18am.  So it shows I got 3 hrs 56 min of sleep.

Not a quality activity monitor.  

Moderator Edit: Clarified subject

[AlejandraFitbit]

It's great to see you around, @Zella723.

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 how it goes.