PDF name changes when downloaded

We have a protected page on our site with PDF files available for download. However, when the viewer downloads the PDF file it loses the attached name and becomes a long, scrambled numerical file name.

Haven’t seen an option and our clients are getting confused with the loss of the filenames. What are others doing to get around this naming change?

eg.
File uploaded and named as pilotlicense.pdf

Downloaded from wix site as:
https://f11e1dce-0c47-490a-9fab-0bd839972750.filesusr.com/ugd/8359d6_58b9d6ccd2343435a814b19b65ef781b.pdf

Hi,

When you upload a file to your Editor X site, it is automatically assigned a name by our servers. Currently, it is not possible to customize the name of the file or to show the original name to your visitors when it’s downloaded.

We will take this a feedback to improve the feature.