VISUAL - champion circle not circular

Annoying that can't just upload the jpeg itself (rafumfrafum middlemen are never as good or reliable...)

ANYWAYS. Logged onto league today in a custom game for some farming practice, and noticed that the champion icon circle wasn't circular - it was all choppy. The rest of the hud was polished and smooth - none of the other graphics seemed disrupted in any way. Unsure of the cause. Occurred with Ravenborn lb against Ryzebot (beginner?) in both fullscreen and borderless modes, but not with Darius as the only dude on the rift.