There's a simple example using trypandoc here.

The following org-mode input is a single list item with a footnote at the end:

- List text [fn:: List footnote ]

But pandoc --from org --to native produces this erroneous result:

[DefinitionList
 [([Str "List",Space,Str "text",Space,Str "[fn"],
   [[Plain [Str "List",Space,Str "footnote",Space,Str "]"]]])]]

It seems the DefinitionList parser is too aggressive. The footnote parser should take precedence.

One workaround is to substitute a named reference, which only requires one colon. For me this is a poor compromise, but YMMV.