It looks like every document (section) in Scrivener projects is getting rendered twice.
Let me know and I can send a test project, but I've tried it in multiple projects with the same result, so I'm not sure if that would help.
I'm using the Paddle version 3.0.12.
My default, I'm using a custom processor with Pandoc, but it also happens when I disable the custom processor (defaults to MultiMarkdown).