Hi @peterba123,
Welcome to the Sony Online Community! As I understand it you are not the only one having issues with Amazon Alexa voice commands to control your Android TV. Try searching for posts on the community to read about other users reporting not being able to turn-on the TV for example. Most often these kind of glitches in the service availability are of temporary nature.
My belief is that as long as the TV Control with Amazon Alexa app remains in its Beta development, early enthusiastic adopters just like yourself will often be facing issues on the road ahead. But don't be disappointed, for a solution to work for the general public, a fair amount of collaboration is required by a variety of different parties. The same goes for the TV Control with Amazon Alexa solution. New features require always roll out time and general optimisation before it all delivers as expected and the Beta development can move on to official public release.
For more details related to the TV Control by Amazon Alexa feature, including its availability and supported Alexa Skills, I suggest viewing this article.
Cheers,
Dutchice
