Hi there… In 10.1.5 Blizzard added a new Evoker spec called Augmentation, which buffs other specs. They have also added combat log hooks, which means we can show the damage the Augmentation provided other players. We support this by attributing said damage to the Augmentation.
In-game damage meters do not have access to the new events for reattribution.
You can read more in our article here: Augmentation Evoker on Warcraft Logs | Warcraft Logs