Audi field concessions

I’ve attended two sellout spirit games (playoffs; home opener), and both times it’s been almost impossible to get food. The lines are insane, and if you wait in them you miss a significant chunk of the game time. Is this always the case at Audi? Is it only for spirit games (vs DC United)? Or is it a function of the sell out crowds, and vendors being overwhelmed? My friends and family have wanted to spend money on concessions, but don’t want to miss the game so we just skip it entirely. Seems like alot of missed revenue for the stadium.