That’s a good question.
Perhaps I actually didn’t displace it (though the logs did show “you displaced …”, but perhaps that was from one move earlier, and not the move that got the dog into the fire).
So then, the question is, do (friendly) dogs accidentally move into fire, even if it’s your own fireplace?
EDIT: I did have three dogs running around me, so I’m not sure if it’s possible that after I moved, but before the displacement, another dog took my old spot, meaning the dog I was about to displace had to be displaced into another freely available spot?