Download file using the wDocs widget not working in v12

In version 12, the ability to download merged documents from the wDocs widget is unavailable. The download initiates, fluctuating between 'Starting...' and '0 seconds left', before displaying 'Couldn't finish download'. However, you can successfully download the file from the Documents module. Does anybody know if this has been raised as a bug with Sugar or should I go ahead and raise it?

Thanks in advance

Best Regards,

Christopher Hart