What I've done?
I've created a new paragraph style for my footnotes in the format root document of my book. I set the layout in the document footnote options, especially the paragraph rules. I've synced all documents within my book to set the same styles for every single document.
Whenever I create a new footnote the paragraph style is adopted as expected but the layout options (paragraph rules) are not. Is there a way to force InDesign to apply the same style for all documents or the possibility to change the footnote presetting?
Thank you for your help.
thanks for the hint. This script works for me. Wonder if they will fix this "error" in the future.
Btw. my ID Version is CC 2015.2