When you using Bladestrom (R1) after Shadows (Q), your ultimate (R1) dissapears. Its bug, because if you use Bladestorm - you cant use shadows, only if you prees 1)R 2)R 3) Q. You can do this bug in 100% moments if you use shift. Hold Shift (Walk - Q - R), and your Bladestorm dissapear and have cooldown. https://youtu.be/-eQ0CIyvaUY - how its look.