I have noticed an intermittent problem on my OpenSuSE 15.3 and 15.4 x64 systems running KDE/Plasma desktop and I wonder if others are seeing it also and what can be done to fix it. Cut/Copy and Paste does not always work. Particularly noticeable in Firefox and Thunderbird, though Kate, Emacs, LibreOffice and other apps as well, display the problem. I select a string of characters from somewhere, even within an app itself, like Thunderbird, right click the mouse to Copy or Cut the selection, then try an paste it either somewhere back in the app itself, or in some other app, and the paste operation fails. It acts and if there is nothing to paste and the paste menu item remains grayed out and unusable. Sometime Ctrl V works and sometimes not. I usually double check what's in the the Clipboard KDE/Plasma to make sure that what I tried to Copy or Cut is at the top of the clipboard app, and it always is. Kinda annoying and sometimes it is impossible to get the Cut/Copy and Paste to work at all. Sometimes it does work and I have no idea why or what causes the Cut/Copy and Paste to work in some cases and not in others. Any ideas? Thanks in advance as always.... Marc...