Please see this link: https://phabricator.wikimedia.org/T212907

The problem in short description is that in some wikis there is a problem with number of articles. Specially the big articles. When any article exceed the transclusion limit of the templates, then the templates in the bottom will not be shown. Also the article loads very very slow.

Then I find out that if we use Rest API https://www.mediawiki.org/api/rest_v1/ to get the content of the pages that contain the same problem, then it will loads very fast, and the problem disappear.

So Aklapper ask to post this question in this email list. See the Phab ID for more details.

Best regards.

Ahmed.