It seems like this problem has persisted for some years now and I was wondering if anyone here is aware of modern workarounds for the problem? I have a hunch that it might be due to how the mp3 was encoded but I'm not sure. The delay is about 300-500ms. This was the bug report on the problem but it was closed for apparently not being reproducible which is a shock to me: https://bugbase.adobe.com/index.cfm?event=bug&id=2878728
Thanks for any info!