Page Links to a page selected in the list produce an inconsistent markdown

[biccio]

If I create a Link or Page Link pointing to a Gitbook page, when I sync the page with Github I get this markdown syntax:
[pagename.md] ((https://app.gitbook.com/s/spaceID/pagename)

Instead, if I create a Link or Page Link pointing to a heading (anchor), I get this markdown syntax
[Complete Heading Title] ((https://app.gitbook.com/s/spaceID/pagename#heading_title)

I get the same correct markdown if I create a link selecting the text
[Selected words in page] ((https://app.gitbook.com/s/spaceID/pagename)

Why the first case is different? it's by design or it's a bug?