I was convinced to do apt-get update; apt-get upgrade
to try to repair a problem in my Debian 10 installation. Now it has a mish-mash of 10 & 11 pieces. After doing that, when I open Nedit, either from the command-line or a tool-bar icon, it opens in a random desktop, always different from the one in which it is opened. My window manager is KDE Plasma version 5.26.90. The KDE Frameworks version is 5.102.0. I tried changing the properties of the icon to use kstart5 with the -- currentdesktop option, but that had no effect. I have an installation of Debian 11, on a different disk, in which this does not occur. But that installation has other problems I mentioned recently. Does anybody have a suggestion how to repair this problem?