Clicking the "View in article" button should scroll the page to the position of the image in the wiki article. This scroll works in patchdemo, but is limited locally when using the Minerva skin and a mobile device in dev tools. I noticed that locally, it only scrolls to infobox images. When you select non-infobox images, the overlay closes but does not scroll to the position of that image in the article.
I _think_ this is an issue with the section collapsing in mobile view, and/or the lazy load images.
Change #1187089 had a related patch set uploaded (by Bvibber; author: Bvibber):
[mediawiki/extensions/ReaderExperiments@master] Fix 'view in article' for lazy-loaded images, collapsed sections
Test wiki created on Patch demo by LWatson-WMF using patch(es) linked to this task:
https://patchdemo.wmcloud.org/wikis/6b99d4c27c/wiki/Main Page
Change #1187089 merged by jenkins-bot:
[mediawiki/extensions/ReaderExperiments@master] Fix 'view in article' for lazy-loaded images, collapsed sections
@lwatson, If this is something that doesn't work locally I'm not sure this is something that needs to go through QA. Especially since this works on patchdemo (where I would test it).
Test wiki on Patch demo by LWatson-WMF using patch(es) linked to this task was deleted: