https://bugs.winehq.org/show_bug.cgi?id=41393
--- Comment #10 from minion minion.procyk@gmail.com --- ah, i re-read the OP and verified this is still a bug.
install xclip
$ uptime | xclip
wine notepad
ctrl+v does not paste the contents (or middle click)
however in any other x window ctrl+v will paste the output of uptime