[GAMEPLAY] Killing lane creeps with Vlad E leaves green square on the ground for 1 second

I was messing around in the practice tool and noticed that when I killed lane creeps with Vlads E, a visual bug occurred. I made sure that I could reproduce it and I can. A green square shows up on the ground for about 1 second after killing the creep with E, then it goes away. It does not appear instead of the damage indicator. I disabled that to make sure that it wasn't an issue with damage indication.

This may not be on live SR, but I don't play Vlad so, if someone can confirm that is in on production that would be great. It's not a big deal, just annoying to see.

Here is a screenshot: https://puu.sh/A6KIz/9d9bb508d1.png