When there is config.xml it can be preffered to koji-generated kiwi description.
config.xml
PR #3498
Metadata Update from @tkopecek: - Custom field Size adjusted to None
Metadata Update from @tkopecek: - Issue tagged with: testing-ready
Metadata Update from @jobrauer: - Issue tagged with: testing-done
Commit 6e9a311c fixes this issue
Commit 0570e46f relates to this ticket
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/3497
Please continue any further discussion there.