Updates of blog posts don't trigger RSS feed

I have an RSS reader that notifies me whenever there's a new blog post at mojang.com. The problem is that whenever a blog post gets updated (not added new), there is nothing to read for the RSS reader, so it doesn't notify me. Of course the app developer could add the function to check the content of every single post at every sync interval, but that would need quite a bit of bandwith every time. And why not just stick to the RSS standard?
Examples: 16w15b and pre-releases 2 and 3 for 1.9.0.