URL Path in PDF Metadata (Safari – Download)

Hello,
we are using the free version and would like to buy the pro version. We need the lock option, a password, a download. But we have a big problem:

– Using the lock option 1. Confirm and 2. Password
– Everything works fine in the frontend and the file can be downloaded after confirmation and password (Safari).
– After downloading, you can find the path URL in the PDF information
– If you paste this into the browser, the PDF can be downloaded without a password or confirmation
– This link works at all times, even if we change the password

We need help!

Thanks