Comment 1 for bug 57415

Simon Law (sfllaw) wrote :

Thank you for your report.

This behaviour has always been the case and is a design feature of X11.

You are describing SELECTION and PRIMARY buffers. They were separate
and have semantics that are both supported by major X applications. It
is unlikely that this will change in the near future, even though more and
more applications prefer exposing the PRIMARY buffer in their menu
systems.