Since 3 days ago Garmin Connect App (Android) shows after synchronizing my vivosmart 4 no sleep time. After setting it manually and resynchronizing the vivosmart again (sometimes two times) it shows the kind of the sleep-phases but no movement-data-graph. Only the colored line at the bottom of the diagramm is visible. If I log into my Garmin Web-account I see the correct movement graph . Does someone observe the same problem?