There exists a config option $wgAllowCategorizedRecentChanges = true that when set, allows users to limit Special:RecentChanges to specific categories.
But on current master, actually using the "Limit to categories" input on Special:RecentChanges results in an uncaught PHP exception:
[236782f10849c858506e6e62] /w/index.php?namespace=&categories=asdf&tagfilter=&title=Specjalna%3AOstatnie+zmiany Error from line 401 of /var/www/html/w/includes/specialpage/ChangesListSpecialPage.php: Call to a member function numRows() on array Backtrace: #0 /var/www/html/w/includes/specialpage/ChangesListSpecialPage.php(79): ChangesListSpecialPage->webOutput(array, FormOptions) #1 /var/www/html/w/includes/specials/SpecialRecentchanges.php(67): ChangesListSpecialPage->execute(NULL) #2 /var/www/html/w/includes/specialpage/SpecialPage.php(522): SpecialRecentChanges->execute(NULL) #3 /var/www/html/w/includes/specialpage/SpecialPageFactory.php(576): SpecialPage->run(NULL) #4 /var/www/html/w/includes/MediaWiki.php(285): SpecialPageFactory::executePath(Title, RequestContext) #5 /var/www/html/w/includes/MediaWiki.php(860): MediaWiki->performRequest() #6 /var/www/html/w/includes/MediaWiki.php(521): MediaWiki->main() #7 /var/www/html/w/index.php(43): MediaWiki->run() #8 {main}
I suspect this is caused by some of the changes to the filters for ERI. (But the issue occurs even with that not enabled. So maybe not.)
$wgAllowCategorizedRecentChanges = true is a very unloved option. I think actually intentionally removing it could be a solution to this task, if it's difficult to support now. But right now it exists and is broken.