Let's specific more info about task result, why task isn't downloaded.
For FAILED tasks suggest save-failed-tree plugin (people mostly don't know about it)
Metadata Update from @tkopecek: - Custom field Size adjusted to None
PR 3488
Metadata Update from @jcupova: - Issue tagged with: testing-ready
Metadata Update from @mfilip: - Issue tagged with: testing-done
Commit c3b6a3b5 fixes this issue
Commit d2c580a3 fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/3487
Please continue any further discussion there.