Stormrazor + Hail of Blades MF is bugged.
It makes that your first aa doesn't do dmg.
And checking it on the practice tool I've noticed that since lvl 1 to 9 isn't bugged but as you reach lvl 10 your first aa doesn't do dmg if you run Stormtazor and Hail of Blades.
Edit: Is not the lvl, the bug appears once she reachs 1.00 atack speed (or more) while having Hail of Blades and Stormrazor.