Scale - Fitbit Sync

I have been using the scale app sync with Healthkit from the beginning and Fitbit sync for a few weeks once it was available. I use the scale every weekday morning. Healthkit syncs perfectly all the data is there. Fitbit is hit or miss. Last week 2 week synced 3 days this week only 2 so far. I have tried unauthorizing and reconnecting the sync but behavior seems the same. any suggestions?