including one double quote in an anonymous footnote?

[Greg Minshall]

hi.  experimenting [after significant confusion!], it appears that
including a single (unpaired) double quote inside an anonymous footnote
eliminates the recognition of the footnote.  is this intentional?

this works:
----
this is a test.[fn:: a very long footnote]
----

whereas this doesn't:
----
this is a test.[fn:: "a very long footnote]
----

i notice that for purposes of exporting, i can have the single double
quote accepted by escaping it with a backslash:
----
this is a test.[fn:: \"a very long footnote]
----
but,
- the backslash itself shows up in both latex and html exporting
- the footnote doesn't get displayed in the org buffer as a footnote
  (the separate colors; this is "font locking"?)

Org mode version 9.5.2 (9.5.2-gbb6830 @ 
/home/minshall/.emacs.d/straight/build/org/)

cheers, Greg