If I have multiple references to the same footnote, in LaTeX export only the
first reference is a clickable link, the rest are exported as dead number
referring to the footnote definition, but not clickable links. I have
`org-footnote-section' set to `nil' by the way.

Here's ECM:

--8<---------------cut here---------------start------------->8---
#+LaTeX_CLASS: article

* Multiple reference to the same footnote 1
This is footnote reference [fn:1]. This is another reference to the same
footnote [fn:1]

[fn:1] Footnote definition.

* Multiple reference to the same footnote 2
This is footnote reference [fn:myfootnote]. This is another reference to the
same footnote [fn:myfootnote]

[fn:myfootnote] Footnote definition.

* Multiple reference to the same footnote 3
This is footnote reference [fn:myfootnote3: Footnote definition.]. This is
another reference to the same footnote [fn:myfootnote3]

* Local Variables
# Local Variables:
# eval: (add-to-list (make-local-variable 'org-latex-default-packages-alist) '("" "setspace" nil))
# End:
--8<---------------cut here---------------end--------------->8---

Regards,

York