Exported file deleted

Hi.
I have a Schedule import of my products, every day, with cron job configured, and I share the link of the xml file to my partners.

Before, xml file was created, and updated in each export.

Now, every time that the cron job execute the export, the xml file is deleted, and only a ZIP with a txt inside is exported.

I tried to created manually the xml file, with the same name that before, and if I run the export manually, the xml file is updated with all products. But next day, the cron job delete the xml file and only create a zip file.

Do you know what is happening?

Thanks,
Rui Parente