[GAMEPLAY] Syndra Stun Doesn't Stun

When using Syndra's knockback stun the stun is not always applied if the abilities are cast in rapid succession. I was able to consistently reproduce this by casting Syndra's orb and then her stun before the orb had finished it's summoning animation. The orb was still knocked back by the effect and dealt damage to champions but no stun was applied allowing the enemy team to walk away from what would have been a successful slaughter. This appears to be new to 5.2.