I've never had this exact situation, but ours starts talking in response to unrelated things we've said, stuff on the tv, or even random sounds in the house (e.

I've never had this exact situation, but ours starts talking in response to unrelated things we've said, stuff on the tv, or even random sounds in the house (e.g. a book being dropped set it off once) several times a week. I've been getting tempted to unplug it.