Documents copied from one document library to another using a SharePoint Designer workflow will not display if you use the Multipage Meeting Workspace. They will show up in SharePoint Designer under the destination document library. There is no error message. The documents are just not visible and gives the illusion that the workflow didn't copy the document.
This occurs because the template sets the advance settings of the document library to no allow Sharing of List Items Across All Meetings (Series Items).
Steps to Reproduce:
If you need this items to display and you don't need this functionality then set that setting to Yes under Advanced Settings and they will show up. The alternative is to think about using a different template as this will be a consideration for all future libraries under the Multipage Meeting Workspace.