Steps to reproduce
- Get Wikipedia App from Google Play
- Open it
- Set language to English
- Search any existing title on enwiki which is not in the main namespace, "Wikipedia:Verifiability" for example.
- Enter the page and scroll to bottom
- Locate "View talk page"
- Tap "View talk page" and choose an web explorer to open it
Expected results
Get https://en.wikipedia.org/wiki/Wikipedia_talk:Verifiability opened.
Actual results
Get https://en.wikipedia.org/wiki/Talk:Wikipedia:Verifiability opened.
Environments observed
App version: 2.7.50333-r-2020-10-06 and 2.7.50333-beta-2020-10-06
Android OS versions: 10
Device model: Oneplus 7T
Device language: English
To say more
This is not a bug brought by the latest update or updates in recent months. It has been there for at least a year, I should say. The problem is not complicated, simply because it adds "Talk:" before titles in all the namespaces to generate their links to talk pages.