share-buttons getting hidden in Safari on El Capitan

[DanBennettUK]

I've noticed a weird issue, in that the share-buttons on posts are not appearing in Safari on El Capitan.

There's literally no style being added for that class, according to Web Inspector. However it is also being set the following;
display: none !important;
orphans: 4321 !important;

Yet I can't find where this is being set... It's not in the SASS file nor in the JS.

If I add display: block !important; to try and force it, even adding a new class for it in the SASS file, it's just ignored.

This is appearing fine in Chrome, IE, Firefox and - annoyingly - Safari for iOS...