Voice message volume decrease music volume on Spotify

In some chat apps, when I'm listening to something on Spotify, for example, and I play a voice message from the app, the Spotify audio gets a little quieter, Which helps the user to listen to both the voice message and the music without having to stop one to listen to the other.  

It's a bit annoying that every time I listen to a voice message I have to pause my music, whereas in other apps I don't have to.

This is a small but interesting feature that will make using Discord better.