Comment # 3 on bug 1204864 from Andreas

(In reply to Fabian Vogt from comment #1)
> X11 or Wayland? Anything useful in the journal? If not, could you try
> "dbus-monitor" in parallel to triggering the issue?
X11


Journald, if I want to open a link in Telegram or Kontact Flatpak, Firefox
won't start
3systemd  Started app-flatpak-org.mozilla.firefox-12172.scope.
user@1000.service  Failed to load module "canberra-gtk-module"
3xdg-desktop-portal  Invalid MIT-MAGIC-COOKIE-1 keyError: cannot open display:
:99.0
xdg-desktop-portal-kde  xdp-kde-background: GetAppState called: no parameters

pdf from Telegram
systemd    Started app-flatpak-org.kde.okular-12948.scope.
xdg-desktop-portal    Invalid MIT-MAGIC-COOKIE-1 keyqt.qpa.xcb: could not
connect to display :99.0
xdg-desktop-portal    qt.qpa.plugin: Could not load the Qt platform plugin
"xcb" in "" even though it was found.
xdg-desktop-portal    This application failed to start because no Qt platform
plugin could be initialized. Reinstalling the application may fix this problem.
xdg-desktop-portal    Available platform plugins are: eglfs, minimal,
minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl,
wayland-xcomposite-glx, xcb.


dbus-monitor log when i click on link in telegram attached.