I'll just assume this is a bug.
List of steps to reproduce (step by step, including full links if applicable):
- While logged in, go to https://en.m.wikipedia.org/wiki/Mona_Lisa (or any other article) and notice the "Article Talk" links below the title.
- Now log out (or open a private window) and visit the same page. No talk page link anywhere.
What happens?:
The link to the talk page is missing. This is also true on talk pages.
What should have happened instead?:
It should have been there.
This task ultimately resulted in T293946 which enabled wgMinervaTalkAtTop for enwiki.