Sleep recording incomplete

[spitfire1]

My Iconic shows sleep of 5 hrs 39 mins (from 2258-428). I went to bed at 2030, husband said I was out cold at 2130 and the first time I opened my eyes was 632. I’ve worn a FB for years, it’s securely on my wrist and at the right position. This failure to record nighttime sleep has happened intermittently since purschasing. I have reset and updated several times. I recognize it does not record sleep less than 3 hrs. Thank you in advance! Any help will be appreciated! 

iPhone 6s+

iOS 11.2.1

Iconic 31.1.16

[SunsetRunner]

Awesome troubleshooting

By resetting, did you restarted or factory reset the tracker?

Restarting the tracker

Fitbit Article: How do I restart the tracker?

It's possible to factory reset the tracker if desired, though make sure if possible to recently have sync'ed the tracker to the account, as it clears all data on the tracker to factory settings & the tracker needs to be relinked to the account..

On the ionic itself:

• Swipe until seeing a icon 'Settings';
• Tap 'Settings';
• Swipe 'Up' to scroll down to 'about';
• Scroll down to 'Factory Reset';
• Tap 'Factory Reset';

Hope it helps