This is an extremely esoteric thing, but #WordPress doesn’t offer an archive page for “standard” posts (within the “Post Format” taxonomy). URLs like `/type/status` work, but `/type/standard` doesn’t, since the “standard” Post Format is just the absence of a Post Format.
But if you navigate to `/type/foo`, it *does* send this string (`foo`) to the `WP_Query`; so `/type/standard` can be made to work, with a tiny little plugin I wrote: