Why doesn't flourish show up in Christie theme?

I’m working with an author who chose the Christie theme in part because she liked the flourish at the beginning of each chapter. I do see the note about it not rendering on Kindle and some other ereader, but I can’t figure out why it’s not showing up in the webbook. I’ve tried changing the chapter type to all 3 options (no type, standard, numberless) and still no flourish. How do I make it work?