[CLIENT] Champion Name Bug

I finished playing an ARAM (as Zac), and went immediately to the champion page to see who I had earned chests on. I noticed the names were incorrect on several of the champions, as you can see in the attached image. Mundo, Amumu, Maokai, Zyra, and Kled are obviously correct, but Zac (Karthus), Nunu (Katarina), Yorick (Kha'Zix) are broken, and so on in the next two rows as well.

Sadly, I don't know how to replicate this, so I'll be sure to note it again should it happen. I don't recall this happening before, and obviously this is nothing seriously detrimental to the game. Anyone else even have this happen?