Here are the steps to reproduce:
Create a new file in the Downloads app (in a category that allows screenshots).
Upload any random file in the first step (it doesn't matter).
Upload the image from the ZIP file attached to this post as a screenshot.
Enter a random title (it doesn't matter).
Re-upload the image from step #3, but this time as an attachment in the Description editor.
Submit the file.
Once the file is submitted, compare the screens