Breach Swarm Kinetic Blast Effect has visual artefacts

I love the new breach swarm effects, and I've been using the Breach Swarm Kinetic Blast Effect. I've noticed that there are significant visual artefacts particularly around edges of explosions or the edges of monsters standing in front of explosions. It looks like some kind of extremely pixelated effect is being applied on what I'm pretty sure should be smooth edges. It's particularly noticeable when paused, but still very obvious when playing normally. Here's a screenshot with a few examples of the artefacts. You need to look at the full sized image to see it.

I'm seeing this both with default graphics settings as well as everything set to max (no upscaling).