VisualEditor transforms interwiki links into external links, and produces broken syntax in doing so
If I try to edit a page with an interwiki link with Visual Editor it will try to transform it to an external link. If I save the page from Visual Editor it will then break the syntax, incorporating the interwiki prefix but trying to render the link as an external link even though it doesn't have a full URL. See https://bindingofisaacrebirth.gamepedia.com/index.php?title=User:Pcj&diff=200935&oldid=200934