Take a look at this page: https://fa.wikipedia.org/w/index.php?title=%D9%85%D8%AF%DB%8C%D8%A7%D9%88%DB%8C%DA%A9%DB%8C:Common.css&action=history
The content should be flowing from right to left (it is a history page) just like this example: https://fa.wikipedia.org/w/index.php?title=%D8%B1%DB%8C%D8%AD%D8%A7%D9%86&action=history
However, it flows from left to right. Having looked at the source code it appears the root cause is that the div #mw-content-text has a class mw-content-ltr and a dir attribute of ltr. These would make sense for the when the content of the page is viewed, but not for the history view.