[GAMEPLAY] - Syndra Ult

So, as I was playing Syndra today I have noticed something wrong with her ult. (Was playing Atlantean Syndra, in case it's just that skin).. Whenever you use ult on someone and they use Zhonyas, it shoots the ult and all of the balls land on the ground, but the ult itself doesn't go on cooldown, so when zhonyas ends, it still counts the balls you previously shot from the ult that zhonyas canceled and you have 6+ balls available for ANOTHER ult right away. I'm pretty sure (or at least I know it's been that way in the past) that whenever you use Zhonyas on Syndra's ult it blocks all the damage and makes it go on cooldown, however that is not what is happening right now. It's just a spam on. Just last game I had 2 people Zhonyas it back to back and it didnt go on cooldown either time.