When transcluding pages in Main, hovering the mouse on the last page's label highlights everything down to the bottom, I would expect only the actual page's content to be highlighted.
Example: https://en.wikisource.org/wiki/The_Wind_in_the_Willows the last page label highlights from "ILLUSTRATIONS" including the copyright box.
Also discussed here: https://en.wikisource.org/wiki/Wikisource:Scriptorium/Help#Interrupt_page_highlight