If Blink = Spell, Who No Trigger Dusk Vigil?

The description/tooltip of Blink clearly states that it is a Spell. The unique staff Dusk Vigil is supposed to trigger Ember Fusillade when casting spells. However, blinking does not seems to trigger on-spellcast things.

There's also some extreme jankyness to blink when you reach the second location. It's like you come out of a sprint and locks your character facing in the direction you blinked which is really messing with skill targeting.