Sleep data missing

[Elanhui]

Recorded fine on Sunday night to the morning but on Tuesday there was info but it had added another three + hours to the previous day starting with my bedtime in the PM on Monday . So 12 hours plus on Tuesday morning for Sunday night and none for Monday night.  Could not add manually since it overlapped with recording for Monday PM until I edited the Sunday night info whereupon it gave no details for the remaining 6 hours.  How do I avoid this?  Since when do people continue a nights sleep 15 hours later then get up after just sleeping three or four hours?  I slept from 6 pm till 3 am Monday night but no recording after 10 pm.

[Talahthas]

Welcome back to the Fitbit community, @Elanhui!

To improve reliability of sleep tracking in general, it's a good idea to set a sleep goal and a sleep schedule. Please have a look at 'How do I set or change my sleep goal in the Fitbit app?' and 'How do I set a sleep schedule in the Fitbit app?' following this link to see how to do that:

How do I track my sleep with my Fitbit device? 

[Elanhui]

can’t set sleep times because I am unable to control when I go to bed or wake up every night. For example ; I have to attend a meeting once a week that keeps me up about three hours past my usual bedtime.  Still does not explain why my Fitbit stopped tracking my heart rate between 12 and 3 that AM and stopped tracking sleep at 10:30 when other devices said I was sound asleep all PM hours after 6.  Also, the health club with the swimming pool opens later on the weekends. I’d rather not fast for 13+ hours.  Got meds to buffer that don’t last that long. You can only drink so much before an hour long swim.  As my sleep is not that efficient it takes me more than 9 hours to get enough.

[Elanhui]

Thank you for the advice. I’m just sorry I can’t apply it any more than I already have.