Blitz pull broken again?
So I am a fairly avid blitz player, he was my second or third most common pick last season, I was silver 2 in solo and gold 4 in 3v3 teams. It seems a few months back the description of blitz's Q where it says that they are stunned while being pulled by blitz actually meant they were stunned and not able to use abilities or spells (like someone who is stunned). Playing tonight I laned against an Ezreal/Thresh combo and later a Trist/Braum. both ezreal and trist were able to arcane shift / rocket jump away during the pull and from the spot of the grab, not from my location. Tristana at one point continued her jump despite being hit by my E mid-air and was able to land fine with no CC on her and walk away. Is this a bug with the new Tristana that she can no longer be interrupted during her jump? When did the stun stop being viable during blitz's pull? I distinctly remember him having this stun and people like ez not being able to jump away after landing a grab. This negates a major advantage that blitz brings to the team, if he can't land his grabs, he's basically a useless support besides the one knock up and minimal damage. Riot, please address this issue for one of my favorite champs!
TLDR: Blitz pulls and knockups are no longer interrupting shift or jump moves from champs like trist and ezreal, did I miss something here when it says they're stunned while being pulled?