So I've found a spot to recreate the shadow issue. From what I can see, it's definitely a refresh issue. I'm playing on a 120hz monitor and lowering the refresh/FPS cap to 60 or lower makes the same problem pop out like normal. Leaving it at 120 or None will cause it to come about only during certain lighting and angles are on-screen. Alt/tab will cause the refresh to go crazy and provoke the problem. Playing in windowed doesn't help much. Well, I guess I'll just have to set it back to DX9 until NVIDIA can push out a patch for it. Hopefully it doesn't come out with DX9 too for me lol.