Lemmy posts can't be read by archive.org

dev.lemmy.ml is unreachable most of the time. Which is fair enough since it's a test system, but in principle it should be possible to access articles via archive.org during down moments. So I went to this archived page:

https://web.archive.org/web/20200319191703/dev.lemmy.ml/post/31321

and it's blank. Some will call this a feature; I call it a bug.