I fail to understand how this can "take some time to address." You alt-tab out of FFXIV, your D3DDevice returns D3DERR_DEVICELOS. So for whatever reason, SE throws a windows error to crash your game. Bot prevention? Who knows. Anyways, alt-tab back in, D3D is smart enough to recognize it needs to reacquire itself for it's rendering calls. Remove the damn error call. Solved. I work with DirectX9, and i've never seen something this stupid.