When I am editing with source code (pre-2017 wikitext) editor (editing and clicking onto preview button), I can see the message:
Pages transcluded onto the current version of this page (help):
And a list of the templates used in the page I am editing (in the article).
But, when using source code (2017 wikitext) editor, I cannot see nor the message, nor the template under it.
This is very important to go to the templates, a see how to use them when editing an article, for example, and other uses.
On the other hand, Mediawiki.org says I are not logged and appears a button (Add topic anonymously), when I really am (I can see my Username in my Userpage. Finally, I could do it, relogin in Mediawiki.org.