Images which has source within the repo doesnt show up in the readme.
Paths with leading slash display as broken image link.
While those without a leading slash has an empty value in src tag.
Second one(when there's no leading slash) is caused because of the D1322 (showdown-xss-filter).
example-
https://archive.softwareheritage.org/browse/origin/https://github.com/kalpitk/t//visit/2019-04-10T17:13:30.059776+00:00/directory/