I've been running alexa on my raspberry pi 4 for some time but after updating Raspberry Pi OS a couple of weeks ago it cease to listen to voice commands. I'm using the sample app and I see the message "Alexa is currently idle!", and can play music from my alexa app on the phone selecting the raspberry pi as output.
It is not listening to the wakeup word. If I use 't + enter' then it answers to voice commands.
Any ideas to solve this?