A page no longer says it is empty when its text cannot be read
A markdown page had one way of saying "there is nothing here", and it used it for two different situations: the page really is empty, and the page has text that it cannot interpret. Both showed "No content yet. Use the menu to start editing."
Only the first of those was true, and the second one cost you your text. The invitation is exactly what a reader acts on: they start typing, and the first save replaces the document that was still sitting in the store, unread.
The two are now told apart. A page that genuinely has no content still invites you to write one. A page whose content cannot be read says so instead, names what is actually stored, and asks you not to start editing until it has been repaired — so the text stays recoverable. The same situation is now recorded in the portal's log, which it never was.