Cannot delete files uploaded using DropZone

After uploading files from a network-drive using dropzone, files cannot be deleted from the network-drive. What happens: 1) Upload file from networkdrive using dropzone 2) Delete the file physically in the networkdrive after the upload 3) The delete looks succesfull, however, after refreshing the file directory, the file is back 4) The content of the file is gone, hence the file cannot be opened 5) After closing the webbrowser, it is (sometimes, not always) possible to delete the file from the directory Is there a solution or workaround for this?
1 answers

I remember we had a similar issue a couple of years ago with Firefox. What happens if you close the browser, do the files still "reappear"? From what I recall it's not a Mendix specific thing but the browser keeping the file open.