How do I stop my ROG Falchion wireless keyboard from rebooting Ubuntu?

For a more permanent solution, append the following config to /usr/share/X11/xorg.conf.d/40-libinput.conf:

Section "InputClass"
Identifier         "disable asus falchioh sys control"
MatchIsKeyboard    "on"
MatchProduct       "ASUSTeK ROG FALCHION System Control"
Option             "Ignore" "on"
EndSection