Chicken Jockeys, when zombie is killed, chicken still attacks

When the new Chicken Jockeys were added in 13w49a, I was playing around with them and when I kill the baby zombie, the chicken still acts like the zombie is still controlling it. It obviously cant do any damage because its a chicken but Its just annoying. I've tried this on both Creative and Survival gamemodes, mostly around villagers. I haven't tried it on myself. I also noticed any zombie on the chicken makes this happen.