Same problem as T119216, but for embedded query forms. When embedding {{Special:RunQuery/Foo}} you get:
<form id="sfForm" name="createbox" action="/index.php?title=Spezial:Abfrage_ausf%C3%BChren/Foo" method="post" class="createbox"> ... <p> <input id="wpRunQuery" tabindex="3" title="..." type="submit" value="..." name="wpRunQuery"> <input type="hidden" value="" name="sf_free_text"> </form> </p>