Powerpoint- media playback

I’m viewing a .pptx which contains embedded audio clips on some of the slides.

When I click on the shape in Libre it does open up a window on the right hand side called “media playback”, with a play, pause, stop button etc. But hitting the play button doesn’t do anything. Tested same document in Powerpoint and it works fine.

Is there an add in I need to install, or a setting to configure, to make the media playback work?

Thanks