Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
It's great to see you here @DibaSr. If your Blaze is not registering your sleep, I recommend Restarting your tracker. After the restart process, test your Blaze.
I hope this helps, let me know the outcome. 
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hello @DibaSr are you still experiencing issues with your sleep log? If you are please review the sleep sensitivity of your tracker, if you have it on "Normal" try changing it to "Sensitive" or vice versa, also you can try changing the tracker to your other wrist, and experiment with how tight you wear it.
Hope this helps! 😉
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