Plesk 12.5 backup error

With a recent upgrade to Plesk 12.5, we've noticed the following error each time a Plesk backup runs as follows. The file that it references is a temporary one that created and then every 60 minutes by the plugin itself but our question is, why throw an error if the file was removed and how can we prevent Plesk from throwing this error each time? The plugin properly removes the files when it hits the removal window so why would Plesk have a problem with that?

Backup task finished on host...

Plesk 12.5 backup error