For years I have been designing custom campaigns and creating AI for a recent one I am creating, I realized that the HARD difficulty is not recognized and is replaced by NORMAL, at first I thought it was a problem with my AI design or the map, but then playing the story mode in the original campaigns of warcraft 3 I realized that the same thing also happens, the hard mode is replaced by the normal one, before this did not happen I suppose that since the last updates something was bugged in the base game, anyway I was checking with the community and streamers and they also have the same problem so it’s not just me, I hope they soon find a solution to this horrible bug that ruins the experience of many.