CSV export file doesn’t save form when all forms

Hi, we have a page when we have a lot of different forms and we have a crontab to export this forms registries to a CSV file to work with it later.

The problem begin when we put in the export options to export from all forms, because every form has an upload file option and in the CSV it does not appear the form where the file is.

We obtain: https://www.grupoavance.eu/wp-admin/admin-ajax.php?action=cfdb-file&s=1519754712.1728&form=%2A&field=cv

Instead of: https://www.grupoavance.eu/wp-admin/admin-ajax.php?action=cfdb-file&s=1519754712.1728&form=Administrativa+de+tr%C3%A1fico+en+empresa+de+mensajer%C3%ADa&field=cv (example)

The page I need help with: [log in to see the link]