[source commits browser] README.md button=Raw shows rendered HTML, not raw Markdown

I recently wanted to yank some Markdown markup from a previous commit, so I browsed from a project page to its section=Source to its README.md commits to a version of the README that I wanted, appropriately rendered (as HTML). Since I want to access its raw Markdown (to copy), I hit button=Raw ... which shows me more rendered HTML, just like the previous page, though without the bitbucket UI "wrapping."

Should't clicking a button marked "Raw" show me the raw Markdown for the file?