If I'm not mistaken the reporter said "going back to Ross Barkley." Generally, they are either not paying attention (like you said), trying to agitate for an answer or trying to get a sound bite. I think he was just trying to get a better sound bite on Barkley because he was giving short answers.
Oh yeah, no doubt they were looking for an angle or hook from him because he wasn't interested in answering. But Koeman's one of them; 'I answered this last week, I'm not doing it again' sort of managers instead of playing the game with them every week.