https://en.wikipedia.org/api/rest_v1/page/html/Hulk_Hogan
"Note 5" expands to https://en.wikipedia.org/wiki/#cite_note-5. It should expand to https://en.wikipedia.org/wiki/Hulk_Hogan#cite_note-5, or better yet, stay on the restbase page.
If it chooses to expand to a canonical Wikipedia view, it must also account for oldid when viewing older revisions. So the "base" url would be something like /wiki/Hulk_Hogen[?oldid=#] instead of /wiki/.