If a post has heading markup and has been edited, the revision histories' inline and side-by-side views seem to show them all changing on each and every edit, even though they aren't edited at all. (The side-by-side Markdown view isn't affected.)
As an example, see https://meta.stackexchange.com/posts/135361/revisions: in revision 58, Glorfindel added an image. The Markdown diff shows only that part changing:
However, the side-by-side view shows not only that change, but also the headings being removed and re-added:
This seems to be affecting all posts, not just this post. See also https://meta.stackexchange.com/posts/188732/revisions: in this case, as the post has a lot of headers, this bug makes it extremely difficult to zone in on what exactly was changed each edit, as one has to scroll past a lot of headers being (un)changed.
Why is this happening? Can it please be fixed?