Kalista's auto attack didn't do any damage to Evelynn

At 3:47-3:48 mark, you can see my (Kalista's) auto attack flied toward Evelynn but it didn't do any damage to her. Not sure if that's a known bug or not. She was surprised by no damage as well... Here's a DropBox link to a replay if needed: https://www.dropbox.com/s/qd01y2vguz581px/EUW1-3308434210.rofl?dl=0
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