Oh. Yay. Since upgrading to #Debian#Trixie a Suspend/Resume cycle kills kwin, firefox, bitwarden, signal, spotify and emacs on resume. Actually much more #KDE things than kwin, kwin is just the visible thing. Quick look in journalctl shows a whole load of those plasma-* dying. Right before there is Wayland dying. Probably should switch back to X11?

Need time for debugging, later somewhen. Not now.