Soo invisible nunu is back

Hey the fixed bug is still in the game somehow oh I can't believe it. How did this flawless company who put so much work into coding and keeping this game smooth still have this bug?

So I was having a very fun time playing against the balanced and high skill cap champ cassiopeia and boom invisible nunu ganked. My pre-made told me that he was looking at nuunu and then he disappeared from the map so it's not sth that only happened to me. Fix the game for a change riot I know it's really hard for u to care about something that doesn't make u money but u could try if for a change.