Pick 31 had been on the clock for several minutes before they even announced that pick 30 had been traded, and pick 29 hadn't even been announced by the commissioner.
I don't think it was anti-Seahawks bias though, as there were commercial breaks and irrelevant garbage wasting time during a lot of team's picks. Seattles was especially bad, but it might have had something to do with it being near the end of the night and them needing to fit in more ad stuff that they were on the hook for. ABC probably fell behind when they had Luke Bryan talking about nothing for half an hour.