When I change a playlist, the first thumbnail gets the vjs-playlist-now-playing class applied, eg:
<picture class="vjs-playlist-thumbnail vjs-playlist-now-playing">
And this means the "Now Playing" text appears in the center of the thumbnail, which is great.
When I subsequently click on another playlist item, the text does not appear in the center of the thumbnail and the vjs-playlist-now-playing class is not added to:
<picture class="vjs-playlist-thumbnail">
JS version 3.0.2 and I'm not entirely sure which CSS version I am using :/ (It might be the one used in the advanced videojs example as that was the only way I could locate the CSS file and not the LESS file).