When using Aerial Assault in conjunction with “Twilight Strike” (Umbral blades thrown) and the “Cacophony of Steel” node from Umbal Blades (Blades create bladestorms) the bladestorms will appear at very distant locations or seem not to spawn at all. I cannot tell if the daggers themselves are behaving similarly or even causing the bug by being launched across the map as the animation is too fast to really discern.
Also sometimes they (bladestorms) spawn with three stacked on top of each other rather than at unique dagger positions.
I first noticed this occuring in / around the Immortal Citadel parts of the campaign and afterwards on the Heoborea maps.