[GAMEPLAY] Sound bug with Battlecast Cho'Gath skin

The missile "pew" sound effect for the vorpal spikes stops playing when Cho'Gath reaches 10 stacks (maximum size) with his ultimate at level 3. If this bug could be fix it'd be much appreciated c:

Also, I found a visual bug with this skin and posted it to the forums yet it got no attention. Here's the link