[GAMEPLAY] - Zac unable to move through monsters

Description: When jungling as Zac, you're supposed to be able to move through monsters that you've hit with W (Unstable Matter), as of patch 4.11. In the current live patch in NA, that's not happening. I have to path around monsters like normal, and got myself trapped against the wall by Krugs a couple times.

Repro Rate: Within a single game, it happened dozens of times. I only noticed it two games ago, so I'm only 2/2 on repro rate.

Repro Steps:

1. Enter Summoner's Rift as Zac.
2. Put a point into W.
3. Hit neutral monsters with W.
4. Immediately after step 3, attempt to walk through the monsters you hit.

Result: Zac paths around monsters. Expected Result: For a few seconds after being hit with W, Zac should not have unit collision with those monsters.