My imported manuscript's Introduction became Chapter 1. Why?

From version 1.9.21 BookyAI recognises a section titled "Introduction" (or "Intro") as front matter when you import, so it lands before the chapters and no longer shifts the chapter numbers. In the import review you can still change where any section lands with the list on its row: Chapter, or one of the pages around the chapters such as Preface, Introduction or Epilogue.