The {{databox}} template on that wiki needs the "infobox" class, as this is what MobileFrontend uses to detect.

I added the infobox class which hoists the paragraph. Apparently div.infobox doesn't go full width, only table.infobox.

Change 613663 had a related patch set uploaded (by Esanders; owner: Esanders):
[mediawiki/skins/MinervaNeue@master] Apply infobox styles to div's as well as table's

https://gerrit.wikimedia.org/r/613663

Change 613722 had a related patch set uploaded (by Esanders; owner: Esanders):
[mediawiki/skins/MinervaNeue@master] Apply mobile width fixes to infoboxes explicitly

https://gerrit.wikimedia.org/r/613722

Change 613663 merged by jenkins-bot:
[mediawiki/skins/MinervaNeue@master] Apply infobox styles to any element with the class

https://gerrit.wikimedia.org/r/613663

Change 613722 merged by jenkins-bot:
[mediawiki/skins/MinervaNeue@master] Apply mobile width fixes to infoboxes explicitly

https://gerrit.wikimedia.org/r/613722