Using the Print option in Workfront Proof provides an export with the Proof Name if the email option is used. If the Print option is used and the user downloads the proof, the name of the download defaults to "Workfront Proof" and does not use the Proof Name. Please use the Proof Name for the default name of this file.
The reason users are doing this is because it is much faster to send it to the Printer and 'Save as PDF' then it is to wait for the email option.