Crappy truck, crappy backhaul, backup backhaul.. no idea. You see it a lot on football games, too, especially with Sunday Ticket. There's always a game or two with hideous PQ.
I remember touring the trucks when CBS had the Final Four from Ford Field. There, the primary backhaul was fiber. The two backups were satellite with one of them being the "if-all-else-fails" Ka-band backhaul. One truck was for the game, the other handled pregame and halftime productions. I'm sure Ken or especially Gary could give you more technical information w/r/t feeds coming out of Auburn Hills. But the Palace games certainly were sub-par.