I cannot get Siri to work on my iPad Pro 12.9. The set up works fine. And the microphone is ok because I’m using it right now. However when I say hey Siri nothing happens. I have to hit the Home Button to activate Siri. I have tried restarting the iPad, reinstalling Siri and nothing helps. I say “Hey Siri” and nothing happens. I am not sure what else to do or to check. Any suggestions?