Hi Karl. Thanks a lot for letting me know.
Loading scenes with audio will normally work just fine, so something special must be going on. Its probably still a bug though, so we need to find it and fix it. I also hope to be able to help you in your current situation. Would you mind emailing me your problematic .ap file? I hope we can analyse it and find out what is causing the problem.
My email address is the one you got your activation key from. If the file is very large, please use wetransfer or some other way of sending large files.