Charge 4 is not tracking my sleep data

[Clericalerror]

Back on this topic. Now into 8 days of sleep over 3 hrs and only one day showed sleep score.  Every other day just shows basic information! So annoying, as no BR or HRV recorded. Tried all the old hacks to get it to work. Switch off, then on; delete Cache; uninstall app then reinstall; restart charge 4.  All to no avail. Have also tried in various positions on wrist and tightening/loosening, all making absolutely no difference. Not the first time this has happened to me.

Moderator Edit: Clarified subject

[ManuFitbit]

Welcome to the forums @Clericalerror.

Thank you for sharing the details regarding this situation with your Charge 4. Sorry to know the difficulties that you are experiencing. 

Please keep in mind that there are some factors that may prevent your tracker from recording your sleep.

Wearing your device on your non-dominant hand and monitor it the next few days the following:

• If you slept in a position that prevented your device from getting a consistent heart-rate reading or wore it too loosely. For best results, wear your device as described in this help article.
• If you slept for less than 1 hour for sleep patterns or less than 3 hours for sleep stages.
• If your device’s battery is critically low.

Confirm that you have restarted the device as indicated here.

[Clericalerror]

Thank you for your advice. The only thing I haven't tried recently is
wearing my charge 4 on my non dominant hand, but I have tried that
previously without success.

However, willing to give this a try.