Sleep has large errors

[Dodolona]

My Ionic has the latest software update.  In the past, I think pre-iOS12 Sllep was giving realistic measurements and was reliable.  Since I can see about 30% errors in recording sleep patterns.  I tried changing the sensitivity in the Settings but it make any difference.

My Sleep is set for 7 hours and it is hard to meet this target because such large errors.

i hope Fitbit is reading this comment and do something positive to fix the issue.

[CLAStorm]

My Ionic has large errors >50% when checked against a medically performed sleep study.  Has quit looking sleep stages and reruns a constant sleep score of zero.  It is essentially untrustworthy and useless as a sleep quality monitor.   I am not sure of the relationship to recent software changes.  I find the forum a great place to place a concern but not useful for answers,  Help!

[SilviaFitbit]

@Dodolona and @CLAStorm Welcome to the Community. Thanks for the details mentioned and for changing the sleep sensitivity. 

You could learn more about Fitbit tracks sleep by checking these articles: 

- What should I know about sleep stages? 

- How do I track my sleep with my Fitbit device? 

Also, please provide me with a screenshot of the data that you used to receive and the data you're receiving now. 

Keep me posted.