Note the careful use of language. All of the sources you quote refer to your “stay permit” or your “stay” being automatically extended. Your permission to stay

Note the careful use of language. All of the sources you quote refer to your “stay permit” or your “stay” being automatically extended. Your permission to stay is indeed extended, since they are promising not to fine you for overstaying (which is what the law that was passed to enable this actually says). This is not the same thing as your visa being automatically extended. To understand why the distinction matters, see the reply I’m about to write to your sibling comment.