Quinn Vault into untargettable enemies disables her AA's
If quinn uses Vault (E) on an enemy that becomes untargettable ( I was against a Maokai ) she becomes unable to Auto Attack anything until the duration of Harrier ends. It happened well over a dozen times in my last game to the point where the enemy noticed it and began exploiting it, saving his Twisted Advance for anytime I would target him. The Vault goes through and after landing I was unable to Auto Attack any target until Harrier ended on Maokai.
While this isn't a huge deal as Quinn players are few and far between it is still annoying and more than disrupting to her entire game.