Audio-Request are stalling in Course-Presentation



I've integrated H5P in our application (mostly based on the Wordpress integration) and it generally works fine :)

But I have a strange problem with a course-presentation that auto-plays an audio file on each slide. After a few slides no more content can be loaded because all requests are full with audio-files that have been partially loaded and then paused (but not closed) when I moved to the next slide.

The same presentation is working fine with the official H5P Wordpress-plugin.

I would have thought, that the requests would be handled by the h5p-core-libraries (which I did not change), but I must have missed something with the integration.

Does anybody have a tip or an idea where I could start looking for a solution for this problem?