inspected the post-load DOM & source. Looked at the structure both of the current & archived versions of this page. The exact same HTML & Javascript is in the first archive of this URL (24 Dec 2019). There's no sign this is client-side dynamically generated.
The content was changed by a human*
Constitution Sections on Due Process and Foreign Gifts Just Vanished from Congress' Website
Constitution Sections on Due Process and Foreign Gifts Just Vanished from Congress' Website
Part of Article I Section 8, and all of Sections 9 and 10, which address things like habeas corpus, nobility, and militias, are gone from Congress's website for the Constitution.