Maybe it's just me…. But since the new firmware update my Fitbit has not read my heart rate unless i reboot or reset the whole thing. Even then it doesn't last long. :
Solved: Charge 4 Firmware Update - 1.100.34 - Fitbit Community
Fitbit Charge 3 - Update 2019 april
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Gelöst: Benachrichtigungen vom Android-Smartphone funktion... - Fitbit Community
Solved: Charge 4 Firmware Update - 1.100.34 - Fitbit Community
how do i update firmware - Fitbit Community
Gelöst: Fitbit OS 4.0.1 - Firmware Aktualisierung (68.9.12... - Fitbit Community
How to Fix Fitbit Firmware Update Failed Error
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Gelöst: Meldung: Benachrichtigungsdienst nicht aktiviert - Fitbit Community
How to Update Your Fitbit
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Solved: Charge 4 Firmware Update - 1.100.34 - Fitbit Community
Ankündigung - Fitbit OS Firmware Update 5.1 (44.12... - Fitbit Community
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Fitbit synchronisiert nicht: Ursachen und Lösungen
Solved: Firmware update disappeared, skin temperature says... - Fitbit Community
Solved: How do I fix Fitbit device "Update Failed"?