User blog comment:MisterWoodhouse/A change to Shared Help on the Unified Community Platform/@comment-31790818-20200709001513/@comment-26082551-20200710103900

Pages where the magic word is attempted to be used to set the title to not be equivalent to the page's actual title are categorized in Category:Pages with ignored display titles. Basically, you can't use that magic word to change the title itself, you can only change the capitalization of the first letter.

For more info see mw:Help:Magic_words