Locally, the shuffle button doesn't show up for me. When I look at the html, it looks like this:
<input class="shuffle" name="shuffleButton" type="button" value="Shuffle questions" style="display: none;"/>
So for me it is correctly hidden, even though it shouldn't be. In production, i.e. view-source:https://en.wikiversity.org/wiki/Help:Quiz it also has the style display;none but shows up nonetheless.
In mobile the shuffle button is also missing:
Presumably it shouldn't have display;none as the style, but I'm curious also as to why it *is* showing up in production? Is the style for shuffle button being overwritten somewhere?