Zz'Rot Portal Minion BuG (GAMEPLAY)

I recently played a game in Ranked when something wierd happened. bought a and put it in mid lane, she put it a bit above the inhib on our red side.

What started happening was that the mid minions started to get stuck at nexus turrets, they became a huge ball and was stuck until the zz'rot expired. Even though they didn't really do anything to our game, i can't say for other's.

I think it may be a pathing issue, because i have no idea how this happened.

Please look into this, as the minion clump could be game breaking under the right curcumstances.