I was playing with friends yesterday and we ran into a random map in Act1 Cemetery called "Development Hell" where normal mobs were not showing on the minimap at all, only Bosses appeared. All the mobs had real people's names, presumably those of D3 Devs.
Debug overlay (F11) showed the map name as trdun_crypt_sew_02.
This happens on both 32 and 64bit versions.
More info on this map: Development Hell | Diablo Wiki | FANDOM powered by Wikia