Exporting to Word - footnotes

I have exported my Scrivener (PC) project to Word (docx), and the footnotes appear as they should, but when I go to add another, it comes up as ‘1’, even when it is between ‘19’ and ‘20’. How can I fix this?

https://forum.literatureandlatte.com/t/scrivener-footnotes-exported-to-word/36419/1