nano command execution stuck

In nano v8.0 there's an option to send selection to X clipboard in the nanorc: "{execute}|xsel -ib{enter}{undo}" which does perfectly. I tried using xclip utility instead: "{execute}|xclip -sel c{enter}{undo}" The result was an infinite execution [ Executing... ], insensitive to interaction until hit ^C. After the cancelling it appeared done the copying, no errors, but what's with the stuckage? Why does it happen and is there a fix? I'm on Kubuntu 20.04.6 LTS (Focal Fossa).