Background
The MobileFormatter only runs on the mobile version of skins. This means desktop skins do not have section markup meaning much of the Minerva JS fails miserably.
page issues do not appear on any desktop page.
e.g.
https://en.wikipedia.beta.wmflabs.org/wiki/Selenium_page_issues_test_page?useskin=minerva
Compare this with:
https://en.m.wikipedia.beta.wmflabs.org/wiki/Selenium_page_issues_test_page where a page issue shows in the top.