I encountered this odd glitch as Aganos. I had two walls set up, then hit my opponent with a rolling rock, then went into shadow ruin. It landed but my opponent fell to the ground instead of going through the walls. After the glitch occurred, the gravity for the other player (Glacius) was messed up. His jumps were really short.
http://xboxclips.com/KaliniuS/f23fc84f-57f2-45f0-ac6d-b2f7113c884b/embed