This issue appear to be related to the portal translation engine for non-english users with non-english language set in user preferences.
- set user profile language to EN
- clear browser cache
- set user profile language to the favorite one.
In the src view, the file README.md is not rendered (or at least it get rendered once in a (long long) while). Instead of a formatted text, the markdown plain text is shown.
Browser: Chrome 67.0.3396.99 and firefox 60.0.2
The same markdown is correctly formatted in the preview page of the online editor