Are you using the latest version of the CF Scout app? It so, we've changed the way Farm Works interacts with the app. Farm Works will now do two way synchronization so it uploads Clients/Farms/Fields and Boundaries to Connected Farm so the app can access them and at the same time it downloads any new tasks logged with the app.
You will no longer see tasks in the device inbox. Instead you get the data by selecting the "Sync resources with website" button in the Connected Farm tab of Farm Works.