F5 vs FSN Game 5, Ezreal takes no damage from LeBlanc's Q

At 6:46 (in-game time) or 10:20 (youtube time), LeBlanc attempts a Q > R > Q combo on Ezreal. Ezreal E's at the right time, and consequently LeBlanc's R > Q does not deal damage and her R doesn't even go on cooldown. The animation was shown, however.

You can tell LeBlanc (F5 Gate) was confused about what happened.