Though most issues in League of Legends are resolved when new patches arrive every other week, there are some instances the developers can’t simply sit and wait on—much like with what happened today.
Right before the second major League patch of the year welcomed much-needed changes to a handful of champions and even more items, Riot Games stepped in to fix some potentially game-breaking bugs with Karthus, Graves, and Twisted Fate that made them much weaker than they should be. Today’s micropatch has been added to League’s live servers and the issues are not expected to persist further.