KDE resolution broken when toggle it maximum


I using latest 20.12 Manjaro which I installed to Raspberry Pi 4, last night i tinkering the settings and I stumble in resolution settings the default resolution is 1980x1080 and I saw 3840×2160 so I change it to 3840×2160 after I click apply my screen go off after that all windows are stretched and I cannot click on all menu in my screen. I just can using SSH to control my device any suggestion to fix my problem ? thanks.