Hello @Jojomrn, great to see you have joined the Fitbit Community! I saw you need to restart your Charge 2 in order to sync, otherwise your data is not syncing.
I'm wondering how it goes, is the syncing issues persisting? For some additional help, please review this help article: Why won't my Fitbit device sync?
It would not hurt to reset the Fitbit app as well: log out from your Fitbit app and go to your phone settings. Access to the App manager option and look for the Fitbit app in your downloaded apps list. Once you are there, clear the app cache and data and proceed to "Force Stop" the app. (This may vary depending of the Android device and the OS version)
Finish the workaround by restarting your phone. When your phone has initialized, go back to your app and try again.
If the issue continue, is worth to mention the Galaxy S9 is not yet listed as compatible. This is not an statement that the app or tracker won't work, is just that we cannot guarantee all the functionalities will behaves as is expected while we haven't confirmed its compatibility.
See you around and hope this helps.
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