https://bugs.winehq.org/show_bug.cgi?id=41393
--- Comment #11 from Alexandre Julliard julliard@winehq.org --- xclip only sets the primary selection by default. You'd need to use "xclip -selection clipboard", or set the UsePrimarySelection option under HKCU\Software\Wine\X11 Driver.
AFAICT everything works as expected.