{{fullurl}} only recognizes single interwiki prefixes, so that {{fullurl:w:fr:pomme}} will point to "fr:pomme" on en.wikipedia instead of "pomme" on fr.wikipedia. Since queries are not forwarded, {{fullurl:w:fr:pomme|action=edit}} links to "en.wikipedia.org/w/index.php?title=fr:pomme&action=edit", which redirects to "fr.wikipedia.org/wiki/pomme" (notice the query's disappearance).
Ideally, {{fullurl}} should correctly parse consecutive prefixes; alternatively, wikis should forward the query parameters when redirecting to another wiki.
This is useful for crosswiki link templates that accept input interwiki links.
Version: 1.11.x
Severity: enhancement