Red bar in Hypnogram

Today’s sleep tracking is a little weird.
I have a red section that’s lower than the deep sleep bar in the Hypnogram.
The “Understanding sleep graphs” section also doesn’t help. There are the 4 different types in the Hypnogram explained but the 4th is empty.
(See attachments)


The red bar means something like “no connection to device” or “battery saver active”. So basically the app doesn’t have data from that period.

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Thanks for the info. Weird, worked before, worked afterwards. Would be interested what caused that short error. :smiley: