On desktop, the [[Jazz]] article has an audio clip. This audio clip does not appear in the [[Jazz]] article in the mobile app. It should.
Proposed a change to template:sister https://en.wikipedia.org/w/index.php?title=Template_talk:Sister_project&action=history
Apparently the sister boxes are the reason that mbox-small is hidden completely. By adding a semantic class, we can narrow the scope of the MF hack.