@ABTOP : When you click on "Add comments" it opens the article page but it doesn't display the comment form right away, you have to scroll to get it. If you replace "#addcomment" with "#addcomments", it displays immediately the comment form.
@Est123 : To solve the problem, edit the jcomments.php file that is in plugins>content>jcomments
Replace this :
$tmpl->addVar('tpl_links', 'comments-count', $count);
$anchor = $count == 0 ? '#addcomment' : '#comments';
With this :
$tmpl->addVar('tpl_links', 'comments-count', $count);
$anchor = $count == 0 ? '#addcomments' : '#comments';
Save et replace the old jcomments.php with the edited one on your server !
I just did it and it works perfectly :-)