That must be a typo.
Some people sorted things out by renaming ~/.local/share/kscreen to something else, and rebooting the system, but not sure about the standby part if that helps.
What it might help is to create a fixed layout for your screens in Nvidia X Server and append that to /etc/X11/mhwd.d/nvidia.conf so the Section "Screen" has predefined metamodes for the ports where your monitors are connected.
In other cases you can make use either to enable early KMS via /etc/mkinitcpio.conf and add
nvidia nvidia_modeset nvidia_uvm nvidia_drm
into the MODULES line
or (if you are on unstable or testing branch) you can use the kms entry in the HOOKS line, so it will look like
HOOKS=(base udev autodetect modconf kms keyboard keymap block filesystems)
and then run
sudo mkinitcpio -P
then reboot the system.
Some more info i provided here
and here
Nvidia suggests to enable the nvidia-resume service …
systemclt enable --now nvidia-resume.service
but i don’t use it on my end, so not quite sure if only helps in suspend and hibernate scenarios only.