Sometimes after booting into the vm the screen is still limited to the size of the greeter after picom launches.
It will render into the inaccessible and unviewable area.
Temporary solution
killall picom
relaunch i3 in place mod+shift+r
Potential solutions
set the greeter to be at the desired resolution.
Hope that in an non vm situation it does not happen.
Sometimes after booting into the vm the screen is still limited to the size of the greeter after picom launches. It will render into the inaccessible and unviewable area. Temporary solution
Potential solutions