[GAMEPLAY] Xin Zhao's ult

The problem does not occur always, just sometimes, I'd say maybe 1 out of 10 times. The problem is, even after I challenge someone, and then use my ult, the target still gets knocked back. For example, just now I was playing Xin, I ganked top, jumped on trundle who was fighting my Irelia. Activated my Q, W, jumped on him with E, proced the knockup and immediately used my ult. Used it just so Trundle could get knocked back to my fleeing Irelia and killed her with the last auto attack. -_- This isn't the first time this has happened to me, it occured on several more occasions, it's just now that it has gotten very, very frustrating. Not the first time this has costed me a lot of flame from my teammates even if it wasn't my fault. Please fix this Riot ASAP, that's my main.