The issue could be a regression.
- In Preferences- RC enable "Hide the improved version of Recent Changes".
- Click on Random article or go to any article.
- Click on Related changes - Special:RelatedChanges page will be displayed with the title of an article in the Page name text box.
- Change the name of the article - click on 'Show' - the article title that you just typed will change back. e.g. Random article was
"Leah Soibel", Related changes will display "Leah Soibel" in the text box; delete this title and type "Robot". Upon clicking on 'Show', the article title will change back to "Leah Soibel".
Note: If you go to Special:RelatedChanges not from an article (typing Special:RelatedChanges in the Search box, or add it to a url - /wiki/Special:RecentChangesLinked), all works as expected - you enter one title- the Page name text box will still display this title after you click on 'Show'.