Sergey Bugaev developer of wl-clipboard wrote at github: Hi, so if copying with wl-copy and subsequently pasting with wl-paste works, this means wl-copy succeeds in copying the 0c byte to the clipboard. So the issue must be then in whichever other way that you're accessing the "clipboard of the desktop". assumed this is true, then its a problem of the desktop, or the widget of the task bar. that will, as described, not show the text block where the 0c is included.