Created attachment 109702 [details] notification from Ark See my screenshot from Arch Linux. I don't remember this bug before change my display scale to 1.2. It happens randomly.
The notifications are rendered by the shell.
Just happened again on my Arch Linux running plasma 5.12.4. Unfortunately I do not know specific steps to reproduce yet.
Created attachment 113229 [details] updates notification from Discover on Arch Linux It's not Ark specific. Updates notification from Discover was already affected.
Created attachment 114971 [details] screenshot taken on Arch Linux, plasma 5.14 beta
Please include output of "env"
GS_LIB=/home/stalker/.fonts KDE_FULL_SESSION=true LANG=pt_BR.UTF-8 PROFILEHOME= DISPLAY=:0 SHELL_SESSION_ID=b5b4e771d13c49748934ea7de2191182 COLORTERM=truecolor QT_SCREEN_SCALE_FACTORS=VGA-1=1.2;HDMI-1=1.2;HDMI-2=1.2;DP-1=1.2;HDMI-3=1.2; MOZ_PLUGIN_PATH=/usr/lib/mozilla/plugins XDG_VTNR=1 PAM_KWALLET5_LOGIN=/run/user/1000/kwallet5.socket XDG_SESSION_ID=2 USER=stalker DESKTOP_SESSION=/usr/share/xsessions/plasma KONSOLE_VERSION=181200 GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/stalker/.gtkrc-2.0:/home/stalker/.config/gtkrc-2.0 PWD=/home/stalker HOME=/home/stalker XCURSOR_SIZE=0 XDG_SESSION_TYPE=x11 XDG_DATA_DIRS=/home/stalker/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share:/var/lib/snapd/desktop KONSOLE_DBUS_SESSION=/Sessions/1 XDG_SESSION_DESKTOP=KDE GTK_MODULES=canberra-gtk-module MAIL=/var/spool/mail/stalker TERM=xterm-256color SHELL=/bin/bash KONSOLE_DBUS_SERVICE=:1.26 XDG_SESSION_CLASS=user XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0 XCURSOR_THEME=breeze_cursors XDG_CURRENT_DESKTOP=KDE KONSOLE_PROFILE_NAME=Perfil 1 XDG_SEAT=seat0 SHLVL=2 COLORFGBG=15;0 LANGUAGE=en_US:pt_BR GTK_RC_FILES=/etc/gtk/gtkrc:/home/stalker/.gtkrc:/home/stalker/.config/gtkrc WINDOWID=41943047 LOGNAME=stalker DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus XDG_RUNTIME_DIR=/run/user/1000 XAUTHORITY=/tmp/xauth-1000-_0 XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session1 QT_AUTO_SCREEN_SCALE_FACTOR=0 PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/var/lib/flatpak/exports/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/var/lib/snapd/snap/bin KDE_SESSION_UID=1000 KDE_SESSION_VERSION=5 SESSION_MANAGER=local/Arch-PC:@/tmp/.ICE-unix/831,unix/Arch-PC:/tmp/.ICE-unix/831 _=/usr/bin/env
The new notifications system is not affected by this issue.