Hey, I have an 8X and have the same problem. Someone with a L920 even said this happens sometimes.
I found out that stopping the music by using the "Stop the music!" app* or similar will solve the problem. When you play the music it will work normally (I always start at 3 or so).
It looks like the problem only happens when the track/podcast changes while the volume is at 01/30. I don't know why this is but I know that's how it is for me.
Hope I helped!
Here's the app:
http://www.windowsphone.com/s?appid=...8-685308e1568b