Adobe Presenter HTML 5: Audio cuts off at end of slides

We have an issue where audio sometimes cuts off at the end of each slide.

After some investigation, we have found that the amount of audio that cuts off varies, and sometimes it's none at all - especially when the files have been cached.

I believe what's happening is that slide starts playing whilst the MP3 is still buffering, so the longer the lag, the more audio is cut off at the end, as the slide timing and audio are out of sync.

Has anyone else experienced this issue, and is there a workaround?