I thought my original epub footnote problems were over (Incorrect epub formatting of footnote in blockquote), but…
The compiler is unfortunately making a dog’s meal of the footnotes again. Not only is it back to using blockquote in the footnote itself, but it is overwriting lines in the notes and getting the font size of footnotes wrong. Same problem evident in Kindle Previewer, calibre, apple books and sigil.
Here is a screenshot from sigil:
