Battlecast Prime Cho'Gath audio bug?

I was testing out the new cho'gath update to his r in the practice tool, and noticed that the audio playing on his e was not the same as it used to be, it used to be the sound of scraping metal of the spikes flying, but now it sounds the same as when his e is toggled off. https://www.youtube.com/watch?v=X_aVyShT8lw this is the skin spotlight link that allows you to hear the sound that should be playing when autoing with his e active.