Mundo and DragonSlayer Braum visual glitch.

I was playing a game earlier and I noticed strange visual glitch involving base Doctor Mundo skin and DragonSlayer Braum skin. When Braum's "Winter's Bite" skill made contact with Mundo, the purple "skin" portion of Mundo's body would become invisible/distorted. It looked like holes in his model/frame with the fire visual effects from Braum's skill just kind of hovering in the black open space.

The items I had were Doran's Shield, Sunfire Cape, MErcury's Treads, Negatron Cloak, Ward Trinked, and Warden's Mail. The teams were Mundo, Corki, Ahri, Thresh, Lee Sin, vs Fizz, Fiora, Kha'Zix, Braum, Lucian.

Hope this helps you find the bug.