Hello,
> Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:
> 
> Could you provide an example demonstrating the issue? It should include
> a minimal Org source, the LaTeX output, and the expected output.

Thank you for your response! I have included a minimal example below. I am running Emacs 27.2 and Org-mode 9.6. 

ORG SOURCE

#+latex_class: article
#+latex_header: \usepackage[autopunct,style=american]{csquotes}
#+latex_header: \usepackage[autopunct=true,autocite=footnote]{biblatex}
#+cite_export: biblatex
#+bibliography: example.bib

With only one citation, the footnote is correctly moved outside of the period [cite:@example1]. With two citations, the footnote incorrectly remains within the punctuation [cite:@example1;@example2]. Lorem ipsum dolor sit amet.

ACTUAL LATEX OUTPUT

With only one citation, the footnote is correctly moved outside of the period \autocite{example1}. With two citations, the autocites command is followed by a relax command, such that the footnote incorrectly remains within the punctuation in the output pdf \autocites{example1}{example2}\relax. Lorem ipsum dolor sit amet.

EXPECTED LATEX OUTPUT

With only one citation, the footnote is correctly moved outside of the period \autocite{example1}. With two citations, the autocites command is followed by a relax command, such that the footnote incorrectly remains within the punctuation in the output pdf \autocites{example1}{example2}. Lorem ipsum dolor sit amet.

BIB SOURCE

@Book{example1,
  author =		 {Lorem, Ipsum},
  title =		 {Example, First},
  publisher =	 {Org-Mode},
  date =		 2022,
  address =		 {Stallmanstadt},
}

@Book{example2,
  author =		 {Dolor, Sit},
  title =		 {Example, Second},
  publisher =	 {Emacs},
  date =		 2022,
  address =		 {Utopie},
}

Regards,
Zac Endter