Or, far more likely, it was just a random bug.
Building software is a form of engineering, like building bridges.
Thing is, we're really good at building bridges. We've had a lot of practice, thousands of years of it in fact. And yet still, every so often we end up with a bridge that randomly falls down, or has some weird bugs in it like the Millennium bridge by the Tate modern that started swaying because of some weird resonance thing.
In comparison, we've been building software for 70 years or so. We do not have thousands of years of building software, and as a result we as a species are still spectacularly fucking shit at it. So some times Alexa will whisper, or growl at you, and it's not because of an intruder, or a ghost, or anything else other than a coder who turned up on Monday morning with a spectacular hangover and somehow coded something that randomly creeps people out by accident.
Or my favourite personal example, coded something that generated a random 6 letter word to let people log into an estate agents website, and then gave someone from Essex the code SXCUNT
That was a fun phone call.