has anyone had this problem

I was playing a 2v2 the other day and when the game started the graphics on the game went insane and instead of being able to see everything normally, there were huge glitchy triangles developing from all my units and the ground looked barren and it was like the seizure episode of pokemon, as everything was flashing and weird. I fixed it by resetting my graphics in game, but it was really annoying and very weird.
I was just wondering if anyone had experienced this, as i've never experienced in normal COH, and i've been playing since release.