While using MobileFrontend, when you focus (click/touch) the search box, the page content disappears entirely. The page content should remain visible.
Tested on:
This is true for mediawiki.org, or private wikis; with desktop browsers (Chrome/FF) or mobile devices (Android/iPhone).
Steps to Reproduce:
Compare
https://m.mediawiki.org/wiki/Meza
https://m.mediawiki.org/wiki/Meza#/search <-- you will need to click or touch the search box because the # fragment gets discarded by the browser/MediaWiki