Sleep stages for Blaze

[J24ktGold]

My blaze is recording my sleep but not the new way with the stage data but the old way for a 6 hour period of sleep. Is there a reason it would stop tracking the new way? 

[SteveH]

Fitbit suggest there could be a few reason for this:

"WHY DON'T I SEE SLEEP STAGES TODAY?

There are a few scenarios where you might see your sleep pattern (which shows your time asleep, restless, and awake) instead of sleep stages:

• If you slept in a position that prevented your tracker from getting a consistent heart-rate reading or wore it too loosely. For best results, wear your tracker higher on your wrist (about 2-3 finger widths above your wrist bone). The band should feel secure but not too tight.
• If you used the Begin Sleep Now option in the Fitbit app (instead of simply wearing your tracker to bed). For more information on automatic sleep tracking, see How do I track my sleep?
• If you slept for less than 3 hours.
• If your tracker’s battery is critically low."

taken from: https://help.fitbit.com/articles/en_US/Help_article/2163/