After a campagin mission the exp screen just remains blank, i am already at the 12th mission and as far as i am aware my elites havent gotten any experience so far.
I believe elites get xp only when your playing multiplayer.
Im not leveled a lot of time after doing a mission, but after that when i see the elites in their menu, they are all lvl and no XP!!!! Why??? Why dont you do this bug after 2-3 years??? And how can i leveling my Elites? Not only in multiplayer...