[GAMEPLAY] Pool Party Ziggs Inviso-bombs?! Enemy team never saw it coming...

While playing the bottom team of an ARAM game, I was Cast as Ziggs. I chose the pool party skin and began the match. Half-way through the match, someone from the other team started talking about how they can't see my bombs (Q) when I throw them. Originally, I thought they were just bad at dodging. Later on, other members of the team stated they could hear my (Q) bombs, but not see them until they exploded. Considering how skilled they played, I found the complaint to be plausible and decided to report it.

I'm not sure if this helps at all, but when I started the match, I put 2 points into Q and 1 into E. I didn't put anything into W until later on. Possible point of interest: Nothing about inviso-bombs was said until about 10-20 minutes into the match. I only played one game with this happening and cannot confirm the complaint personally. My friend who sits directly next to me was also in the match and saw/heard the bombs just fine.