Vel'koz visual bugs [Gameplay]

In an Aram game I encountered some bugs with Vel'koz. First, I noticed that my passive was not showing up on targets: when I would hit an enemy with my abilities, it would not show that they had a stack of Organic Deconstruction on them. I asked my friends whom I was on skype with if they could see my passive, the three of them confirmed that they could not see my passive stacks. In the same game I was unfortunate enough to see another visual bug, this time on my end alone: there were various lines, colors not it the correct places, and other graphic anomalies (white sections that shouldn't be there, a yellow trail behind leona, a spiderweb-like effect coming from nocturne). Unfortunately, with my limited resources, I cannot attempt to reporduce the effect, so I will describe as much as I can:

Teams: Blue (bottom-left): Lulu with flash and mark, Leblanc with flash and mark, Xerath with flash and heal, Ahri with heal and flash, and Lee Sin with mark and flash Purple (top-right): Nocturne with mark and flash, Leona with heal and flash, Vel'koz with clarity and flash, Quinn with flash and heal, and Rammus with heal and flash

Map: Howling Abyss

Unfortunately as I have not had a bug like this before I did not know to take a screenshot of these issues.