Preventing Primary Key Sorting in Ecto Preloads

Questions / Help
1

I have this:

    query =
      from b in Brand,
        where: b.id == ^brand_id,
        preload: [
          :pages,
          default_menu: [
            menu_items:
              ^from(
                mi in MenuItem,
                order_by: [asc: mi.sort_order],
                preload: [:page]
              )
          ]
        ]

    Repo.one!(query)

However, in the debug log I see this getting executed:

SELECT ...
FROM "menu_items" AS m0 
WHERE (m0."menu_id" = $1) 
ORDER BY m0."menu_id", m0."sort_order"

How do I prevent menu_items from being sorted by primary key and only sort by sort_order?