Charge 2 not syncing nor recording sleep

[Stitch73]

For the last few weeks my Charge 2 has been tracking my steps daily but when it comes to sleep, it just does what it likes, some nights it tracks it others it doesn't. and to top it off today it's stopped syncing!

I've tried restarting, force stop etc

Any idea what's going on?

Moderator edit: updated subject for clarity

[AlvaroFitbit]

@Stitch73 Thanks for stopping by! Sorry for the delay in my reply.

Let me help you with your Charge 2 not syncing nor recording your sleep. Regarding the sync issues, which phone are you using? Is it compatible? You can try the following:

1. Go to your phone's bluetooth settings and remove all devices listed there.
2. Restart your phone and restart your device. 
3. Check that no battery saving app/feature on your phone is affecting your Fitbit app.
4. Also, if you are using an Android device, check that your app has the necessary permissions (settings > apps > Fitbit > permissions) and make sure bluetooth and location services (GPS) are on. 
5. You can find troubleshooting instructions here.

About sleep detection, your device will start recording sleep after it detects an hour of inactivity. If you have a light sleep or move too much then this may difficult your sleep detection. Additionally you can try wearing your device on your non dominant hand to decrease the amount of movement it is subjected to. Finally you can restart your device. You can also manually log your sleep time. You can read more about sleep detection here.

Let me know how it goes.