For the moment Google Home has issue of continuous playback after 1st song. Similar issue describe there. And we may haven't seen that issue for the long time because you need to play few songs to get that failure - what is time consuming, especially because we need to monitor it all the time.
Solution v1
to log number of continuously played songs and in case when we have distribution of playback duration we can track anomalies. But sure it doesn't give strict guarantee of issue catching.