Choose Any CMS item page from link picker

Ok, so I noticed something very annoying and strange.

When I am writing a blog post in the CMS, in the RICH TEXT editor, I can hyperlink some text and I am able to choose any CMS item’s individual page/slug.

However, when using a regular link text (i.e. paragraph with selected text into hyperlink), I can only choose static pages.

What gives !

Here is my public share link: LINK
(how to access public share link)