Hi, this happened to me also when I was on version .19. My sleep stopped logging suddenly and thereafter never worked again. If your problem persists, which I do not hope, there is a workaround to get you Sleep synced to your Fitbit app.
1. Go to your PC and type in the address bar: www.fitbit.com. As you're already logged in, this will bring you to your personal dashboard.
2. Look for Sleep. When found you will see it's empty. Put the cursor direcly underneath the Sleep block and it will show you "see more". Click that and you go to the page were your sleep is logged bars. Today should show no bar at all.
3. Scroll down the page untill you see the sleep log of every seperate day, listed by days and weeks. Just one rule per sleep. In the right side of that you will see a column which says "log sleep" and you can fill in manually the time and date of bedtime and also the timee and date of waking up. The date is very important, if that's incorrect, Fitbit refuses to log your sleep. Example: your bedtime yesterday was 23:30 hrs on 24th of december and wake up time 9:00 om 25th of december. when going to bed after midnight, make sure that data of both bed and waking up are the same, i.e. 25th.
4. Press log sleep and your sleep will ne logged and shown between the bars and the individual days. It will tell you the check it and after pressing that is added to the individual days and the Today bar will be present too.
5. go to your device, press sync and sleep will appear on the dashboard of your device.
This may seem a lot of work, but all in all it takes about 1 minute max. I only wanted to explain this workaround as precise as possible. Always better than having no sleep at all!! Good luck and Happy Holidays.
