The bugfix on Skarner's E from patch 8.4 introduced a worse bug instead.

The bugfix from patch 8.4 was: 'Skarner will now correctly stun targets afflicted by E - Fracture's Crystal Venom if they received the debuff in between when he began and initiated the attack'

However, in its place is no a bug where you do hit the target between when he began and initiated the attack, he only stuns for a fraction of the original duration.

Reproduction: 10/10 (when previous bug criteria is met) Severity: (low-medium) Gamebreaking: No

Looks to be a simple misplacement of a decimal placement of the stun duration, as it looks more of a .15 second stun rather than a 1.5 second stun.