Transition sound not staying after saved

I am using Libre Office Version: (x64). I have saved an audio file to the transition properties so it will play across all slides. When i initially put the file in it works great every time. Every time until, that is, I save and close. Once i reopen Libre Impress it no longer plays. I have to go to the properties re-instate the file again and it will work smoothly if I start and stop the slide show. If there is anyone who has come up with a work around I would be interested in know what I can do to make this work everytime. Thank You in advance.