Keith,
I just tested this on iPad Pro (9.7-inch) with iOS 13.1.2, running AppStudio Player 4.0.20 and we can not reproduce this issue.
Can you give us more information about the specific iPad you tested?
Also, we created an app to test this and it is shared publicly, it is called "ZipReader Test", you can search for this app in AppStudio Player and test it on the iPad, and let me know what you find.
Search "ZipReader Test" on Public apps
Run the "ZipReader Test" app then click on "Click to Extract Zip File"
Thank you,
Erwin