Player's arm and camera only jerk to the left when getting hurt

The bug

Before release 1.3, while getting hurt there was a random chance of your characters arm to either jerk to the left or to the right along with the camera. Getting shot by an arrow or hit by a mob from the front, your arm and camera would jerk upwards. After 1.3, The camera and arm only jerk to the left no matter where you're hit or what you get hurt from.