Hi
I use a single 1080p monitor, but Wayland session always uses a lower resolution.
I can change to 1920x1080 resolution in system settings > display and monitor, but such setting is lost after reboot.
This problem does not occur on X11 session.
How can I solve this problem?
I use Plasma 5.17.3 on Arch Linux.
Thanks for reading.

plasma also loses the screen resolution after relogin.

solved after I delete files located in ~/.local/share/kscreen/