A temporary workaround is to disable the side monitors.
Jason over at unencumbered by facts managed to get it working with his multi-monitor setup using a single display server, he however is using Nvidia.
The possible solutions are to downgrade lib32-openal to 1.17.2-1, or to start the game with See #Borderlands 2. If on Gnome you can try to open the overview (Super key) and drag the game to the other monitor and back.
If you are not on Gnome or dragging the window back and forth did not work you can try to install Here X and Y is 0,2560 to move the window to the monitor on the right and H and W 1600,1200 is set to match the in-game resolution.
COMMON -dev /dev/input/js0 -X -thresh -18000 18000 -18000 18000 -18000 18000 -18000 18000 -18000 18000 -18000 18000 -18000 18000 -18000 18000 -axis Left Right Up Down blank blank blank blank blank blank blank blank Left Right Up Down -buttons c x Return from that map into The Island as described here.
Ragnarok uses The Island's texture, so the same procedure fixes the issue on Ragnarok as well. Use system libopenal to solve the segfault by running the game with with for 32bit version of libtcmalloc_4 which is needed Source. This is a strange corner case which happens infrequently at best (and the prerequisites for reproducing it are unknown), but the crash would look like this: Thread 3 "Civ6" received signal SIGSEGV, Segmentation fault.
The easiest way to mend this is to just reboot your system. The Steam overlay in FTL does not function as it is not a 3D accelerated game.