SUMMARY Clicking on shutdown, reboot or log out makes Plasma unresponsive and pressing a Ctrl+Alt+Del does nothing. This happens only on Wayland. Plasma 5.25 Beta.
If I uncheck "Confirm logout" in settings, I can log out normally.
Looks like a duplicate of https://bugs.kde.org/show_bug.cgi?id=452243
It's Bug 449948. *** This bug has been marked as a duplicate of bug 449948 ***