I assume its a bug in the framework, maybe try going back a version? Hopefully someone with more knowledge will chime in.
Beware, using SoundEffect for music will export your music in WAV format and increase your deployable size.
I created a tool that converts OGG files into sound effects at run time. This keeps your deployable size down but increases memory usage and load time. I could host it if it is something you're interested in.