Library broken after import XML

[Newzic]

Hello, after exporting an XML file to a blog and after import this XML in a empty Wordpress installation (to a new URL), the result is often a broken Library: it's missing thumbs, as you can see here:
​http://s1380.photobucket.com/user/New254/media/wp-track--library-broken-01_zpskslxbc7t.jpg.html

But if I clic on empty thumb, the media is ok and appear also on the website. As you can see here, after clicking empty thumb, the media is here:
​http://i1380.photobucket.com/albums/ah198/New254/wp-track--library-broken-02_zpsdos6akx8.jpg

After many days of research and try tips found on the forums, plugin tests... I finally found the ultimate plugin that repair the problem:
​https://wordpress.org/plugins/fix-my-posts/

The subject is vast on the Internet if you search "wordpress broken library after moving" or "wordpress plugin repair library"... so i think that there is a problem in the core of WordPress, missing a function "regenerate library" or "repair library".

[lukecavanagh]

So is this still an issue with the WordPress Importer?