I suppose this is possible….
Echo woke up due to a word in background conversation sounding like “Alexa.” Then, the subsequent conversation was heard as a “send message” request. At which point, Alexa said out loud “To whom?” At which point, the background conversation was interpreted as a name in the customers contact list. Alexa then asked out loud, “[contact name], right?” Alexa then interpreted background conversation as “right”. As unlikely as this string of events is, we are evaluating options to make this case even less likely.
I mean that’s a lot of coincidence in there, but anything’s possible. With enough chatter and noise going on, Alexa was bound to “hear” something that sounded like those things. And if it can happen, that’s a problem.