Prevent resizing windows from crashing xorg in qube
Window Manager > Advanced > Hide content of windows: When resizing
The problem described in this GitHub issue can happen to any application, not just the terminal, if you resize windows using the mouse.
You can do it with any window if you repeatedly resize it a few times, the qube will use a lot of CPU, and if it also uses all its memory OOM killer will kick in and kill xorg.
Hiding the window content when resizing solves the issue.