So, we're new to the world of Echo and still much enjoying the novelty of it. The other day we asked "Computer, how are you?" to which it replied "I'm doing great. Did you know cats sometimes talk to me when there's nobody else around? So far I've learned one word: Meow."
On the surface, it sounds like another random story it comes up with, but upon checking the history on the Alexa app, there's been a LOT of meowing going on... when we're not at home. Is it actually hearing meows (we have many cats) and responding without the wake word?? That's a little scary. The other possibility is that our bird has started to say "computer." She does practice new words when she thinks we're not home or thinks we're sleeping, but that would have been an extremely short period of time for her to learn the word since we only just got the device.