My dual screen settings are set by
xrandr --output DIN --off --output DVI-1 --mode 1280x1024 --pos 0x0 --rotate normal --output DVI-0 --mode 1280x1024 --pos 1280x0 --rotate normal
when I close Amnesia from fullscreen, it will disable DVI-1 by trying to change it back to my normal resolution, even though I was already in that resolution. I set my resolution to 1280x1024, and it doesn't change resolution on start.
This does have a workaround (re-executing xrandr) but with the workaround, it moves all my windows on to one monitor, which is annoying.