Voice messages / audio attachments not shown

[ichthyosaurus]

Is your feature request related to a problem? Please describe.
When I receive voice messages / audio attachments, they don't show up in my messages list at all. I had some weird misunderstandings because of that already, when I suddenly missed part of a conversation.

Describe the solution you'd like
Audio files should show up as messages and (optimally) I should be able to listen to them inline.

Describe alternatives you've considered
It would be ok for me if I have to download the file first and listen to it separately, but they don't show up at all.

Additional context
Maybe it would be worthwhile to implement some kind of placeholder for unsupported message types, so that I can at least know that there would be something that I can't see. Then I could check my messages with a different app.