Should Tristana finish her Rocket Jump after using Flash?

Hey all, I'm a Silver Tristana main who's got a small concern about the champ. I've been kind of annoyed by this little issue on the champ for a while now, but I was reminded of it in my most recent game. I threw my E onto an enemy Ashe and attempted to W onto her for the extra stack. She flashed out of range so I flashed to follow her, and next thing I knew I wasn't even in AA range because my rocket jump was completely canceled. While this had no lasting damage on the rest of the game, I did feel cheated by my failure. As someone who enjoys pretending he's Challenger by doing a flash mid E on Gragas, I kind of wish this opportunity existed on Trist. It just feels really odd to waste the entire cast time just to not even land properly with the ability. I'm not sure if this is intended or just overlooked, but I would greatly appreciate if you guys at Riot would consider changing this.