Comment 306 for bug 11334

This is not LibreOffice’s bug.

This has to do with the whole X server architecture. Deep level stuff. An historical issue in Linux distros using X.

Citing Michael Meeks (from bug 48783):

“The X clipboard system relies on the app owning the selection to provide the data; if you close the app - that app isn't there; so it will fail.”

See https://bugs.launchpad.net/ubuntu/+bug/11334 for boring details and funny rants.