5 January 2018. I had the same problem when I originally linked Alexa and Sonos one song would play and then I lost all control of the device from there.

8 Frustrating Amazon Echo Problems With Easy Solutions Cnet
I have a multi speaker setup PlayBase Sub two Sonos Ones.

Why does alexa only play one song. The problem is that it stops after one song. I can request a playlist artist song or station from Amazon music and it will play. Why does Alexa ask me what do I want to play next when I ask to play next song.
This could be due to several reasons such as multiple Alexa accounts linking to the same HEOS account same Alexa account linking to multiple different HEOS accounts or other connection bugs between Alexa. Voice commands to Alexa work perfectly. Alexa only playing one song then stopping on all 4 of my Alexas.
Amazon support is very uninformative about the problem although it seems that many people are calling them about it. I was able to fix it by.

Amazon Alexa Echo Looping Songs Playlists And Routines Smart Home Point

Amazon Alexa App Alexa App Alexa Amazon Alexa Devices
Alexa Can Identify Songs That It S Playing Here S How
Alexa Can Identify Songs That It S Playing Here S How

Ask Alexa To Play These Songs Music For Kids Kids Songs Songs

Is It Possible For Alexa To Repeat The Song Diy Smart Home Hub

2 Ways To Fix Alexa Can T Find Music In My Library Diy Smart Home Hub

Amazon Com Prime Music Happy Pop Songs Music

Amazon Alexa Now Has Free Music For Echo Owners Who Don T Need Prime