Specifically, most of the time, History is not showing changes that are made. In "page differences," the Old and New page versions appear to be identical, even when revisions have been made.
If I add or delete a whole paragraph, that change will show up in differences. However, even several sentences added within an existing paragraph do not become differences. It almost seems like Preview is saving the page and using the Preview as the previous page, rather than the actual previous page.
Is this a bug, or is there a way to ensure that changes are recorded?