Players have found out that cone shaped abilities are bugged and not hitting the intended targets which greatly effects Preservation Evoker and Holy Paladin healing throughput and Windwalker Monk DPS. Overnight, players have realized that Conal abilities such as Dream Breath, Light of Dawn and Fists of Fury are bugged leading to a significantly reduced throughput.
This morning, our Holy Paladin guide writer, Clarius, may have found the cause of this bug, which is that these effects are now aimed in the direction of the camera and not the character. If you right-click your camera into the ground, your Dream Breath will be aimed into the ground.
If you look directly at your target, you will hit your target. However, if you right-click and aim your camera into the ground without moving, you will miss your target because assumingly the cone is now being aimed into the ground.
. Read more on wowhead.com