I have a page in Moodle with several audios (mp3) and 2 videos (flv). As the multimedia filter is active, all the files are embedded.

The problem is that the audios not always are reproduced. When I click the play button, the player (Flowplayer) starts moving but not sound is reproduced. However the videos always are reproduced.

If I create a page with only audios, it seems that the behaviour is always correct. But in the page with audios and videos mixed it seems the behaviour is random.

I've tried to update the browsers (Explorer, Firefox and Chrome) and the Flash player, and also to purge all caches, but the result it's the same: sometimes I can listen all the audios, sometimes two files, sometimes only one...

Link with audios and videos:
https://moodle2014-15.ua.es/moodle/mod/page/view.php?id=18021

Link with only audios:
https://moodle2014-15.ua.es/moodle/mod/page/view.php?id=17081

I think the behavior is similar to:
https://tracker.moodle.org/browse/MDL-42103

Initially, I posted in the General help forum:
https://moodle.org/mod/forum/discuss.php?d=271027