Problem with stream block for third party Alexa devices

I use audio stream blocks in my skill.
I’ve noticed the live audiostreams do not play on certain devices such as:
Alexa app for Android, Sonos and the i-Box Century.
There is just silence.

However, the streams play fine on official Alexa devices and on the iOS app.
Is there any reason why this would be?

seems it depends on if 3rd party device makers implment audioplayer interfaces for their devices.