Sleep data from Fitbit air via Google health connect incomplete in sonar

For some reason Fitbit air and the Google health apps syncs sleep data multiple times. So when you wake up it tells you slept 4 hours, then syncs again and you see the actual total amount and complete sleep data. In Google health Connect the full amount is registered. However in sonar it only shows the sleep data from the first sync, so it's always wrong and incomplete.