[Gameplay] Cho'gath invisible ruptures

What I and a few others saw: A few others and I encountered a bug involving Cho's rupture ability where if you could not see Cho his rupture was invisible till AFTER it knocked you up and then the ring stuck around for a few seconds after it hit like it was charging up for another hit.

Step to step instructions on how to repeat this:

1. get two teams together and head into a limited viewing space with no bushes example the twin golems by red.
2. have cho set up on the red side of the wall and your team set up on the twin golem side of the wall. Make sure that there is space to let the circle spawn cause if the circle clips the wall it seems to be visable sooner then when its cast into a more open space.
3. Have cho rupture the ground under the enemy or in this case the allied team if your the one being ruptured.
4. four pending how the cho ruptured the red indicator circle for his power wont appear till after it knocks every one up showing the spike animations like normal. after the knock up the circle will finally appear and that will stay the normal amount of time for rupture trigger where the animation plays again and the rupture knocks your character up a second time if its in the circle but you wont take damage or be slowed by that one just knocked which is a .5-1 second stun.
5. to confirm that its only when cho is in shadows do a knock up with one of your party looking at the rupturing cho the circle appears as normal and only triggers once.

I have no idea how frequently this bug occurs but in the one match when ever the cho was out of sight it would do this bug. hope you can bust this thing cause it was annoying my team to no good end getting knocked around endlessly by unseen cho'gath.