tl;dr: what bug, or even what kind of bug? "The app" does not provide the share intent panel functionality, the framework does, and even if there was some way

tl;dr: what bug, or even what kind of bug? "The app" does not provide the share intent panel functionality, the framework does, and even if there was some way in which an app could be thought to be to blame, with what permission would it be inserting its resources in a particular spot in the panel?