An issue I had was with Sonos grouping. If I sent TTS announcements to a Sonos that wasn't the master for that group, it would break the group up. Also, music playing on the group wouldn't resume sometimes.
So I ended using Alexa TTS for my announcements (using only Echos, not Sonos speakers). I do use the Sonos to play music or radio stations based on modes or virtual switches.
I strongly suggest you look at this thread - Sonos Grouping
I found that installing node-sonos-http-api-master on my odroid xu4 (an RPi alternative) has made using my Sonos speakers in Hubitat so much better. And the suggestion came from the thread I linked to.
