Shared cloud documents remain in Shared Documents list.

In Acrobat, shared PDFs (mine as well as files shared by others) are deleted but remain in the shared document list, making it impossible to know which documents have completed their work cycle. Clicking the document gives the error message: "File Not Found. The file you are trying to access could not be found. The file may have been deleted or moved in another session." Selecting the document's check box, the management tools are completely absent. We are using the Share With Others tool.