Files inside the zip file have 0kb size

I just tested the library but is not working for me.

It downloaded a file called "name-of-zipfile-to-send.zip", it contains 2 files, but files are 0Kb size.

None of the files have data... any idea?

Note: My Bucket contains 2 files

Start by reproducing the report with a bucket containing two files and the library's zip-streaming entry point. Confirm that the generated archive contains the objects' data rather than only their names; the issue provides no file or test names, so repository exploration is required.

Written by the indexing model from the issue text.