Sending a song to another user not working

[TIG]

For a few updates whenever I send a song to another user through the app it doesn't send properly. It looks as though it has sent but the other user never receives it and it does not show on the inbox tab on desktop. It works sending through the desktop client and I have connected to Facebook. It has worked in the past.

I use a Nexus 5 running Android Lollipop 5.0.1