[GAMEPLAY] Blitzcrank rocket grabing tristana can use the abilitie to jump away

I was play Blitzcrank against a Tristana and any time i tried to grab her with the rocket grab, she was able to jump away with rocket jump abilitie (if not in cooldown). It appeared that she was able to activate the skill after i grab or right when i grabbed her. Or even she used that skill before i grabbed her, if i grab her in the start or in middle champ, it would not take her to me but she completes the jump.

I know in other champions with the abilitie to jump to an area, minion or other champion, blitz can grab them and doesn't happen like with tristana.

By the way she was using the Rocket Girl Tristana skin.