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No Estimated Oxygen Graph

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Last night my Versa 2 didn't record any oxygen variation data, the box is present but empty.  This is the first time since the feature was added that this has happened.  The back of the fitbit is clean, none of the sensors are blocked.  

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Same here - stopped working Wednesday (3 days ago) was working fine before - the box is there but no data appearing. 

I've noticed the red light on the back isn't coming on like before. 

Tried restarting my Fitbit and the back is clean. No change to how I wear my Fitbit at night. 

Just had the firmware update yesterday but the data stopped appearing days ago.

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And the same for me! 🙄

Swedish Fitbituser since Feb 2014. Flex, Surge, One, Blaze, Versa , Charge 3, back to Versa, Versa 2 ,Sense nov 2020, Samsung S20 Ultra 5G, Android 11.
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Same here..suddenly it's just blank, and I am a premium user!

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Wierdly, it came back a couple of days later - and everything that was missing appeared! All has been fine since - I wonder if it was related to the update. I'd say give it a week and just see if it eventually comes through.

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