Deleting file bound to a "File" document does not delete the file in Drive

Nuxeo Drive activated on a folder, working OK.
A document of type "File" has a file bounded to it, say "mydo.docx".
mydoc.docx also exists in the hierarchy of "Nuxeo Drive" folder.
In Nuxeo DM (using Chrome in my case), open the Document, "Edit", select "Delete" for the bounded file, save:

• The Nuxeo document states there is no more file bound (normal)
• But the file still exists in the Nuxeo Drive folder