It is the OS that should transfer the contents of the clipboard to an app, when the user tells it to do so, and not the other way around. The content of my clipboard shouldn't be any app's business until I decide to paste.
My beef is with the person who installs a spy camera in my shower, not with the person who didn't expect someone to install a spy camera in my shower. Only one of those people actually installed a spy camera in my shower.