On Linux the mouse in combination with a mouse button is used to highlight text and that text is copied. Then another mouse button pastes the copied text into the current windows. I normally use this to copy long commands from one terminal window to another or from one application to another.

This works correctly in all cases except extraterm. It works within extraterm. I can copy some text in the extraterm wiindow and paste it in the same window without problems.

But when I/copy some text in other windows and then try to paste into extraterm instead the last text I copied in extraterm is pasted. All of my text copies outside of extraterm are ignored.