Why do scaffolded pages history comparison show always 0 changes?

Essentially, Confluence lists the number of wiki markup changes. When you edit just the Scaffolding data on a page, no changes are made to the wiki markup, so the history page doesn't list them.

Currently, the history page does show the versioned data, depending on what version of the page you are looking at, but it doesn't highlight the changes. I have an idea for this in a future version, but at the moment it's a bit painful to spot the changes between versions...