When hovering a page preview in mobile view (a.k.a. the Minerva skin) I get a slightly cut of setting cogwheel.
First investigation: Page previews are enabled on mobile since T236097: Dev: Popups modules should set targets to mobile and desktop. So the fact that we end here is intentional. The icon might have been broken because of some CSS optimizations we did while working on ReferencePreviews. I did a quick git bisect and found:
- The icon is broken ever since the very first patch https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/571465/ (April 2020, T236097). However, it looked different back then. It was cut off on the bottom instead.
- With patch https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/636710 (November 2020, T256504) the icon changed. Since then it's cut off on the left.
Both patches are unrelated to Reference Previews.