Header formatting unformats when exporting to PDF

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Hello! I'm having a problem that started happening seemingly out of nowhere. I have 3 different stories. All three just have slides made up of links to different folders in my app, within Qlik Cloud. When I export any of my stories, the slide title formatting is lost. It used to be like this:

Now it looks like this:

Am I doing something wrong? Note: The same happens if you want to export just one folder to PDF.