Using CopyQ didn't help. At least it didn't help getting selected and copied text into the clipboard. Sometimes it takes three or more attemtps before I see it in the CopyQ list. Even when the copied text does show up in the list, it is not always pasted, and I have to explicitly select it, but I am not sure if that is how it is supposed to work, because the docs seems to indicate I need to always select what to paste.
It also seems to miss clipboard list selection clicks, double clicks.
So I still have an issue.
Can someone please point me to where I can look to discover the problem? Is it dbus, or some other internal KDE message system that is failing?