I wanted to close the loop on this for any who might be interested. I spoke with my neighbor for further details and the oven was not internet connected (or capable) so hacking or similar interwebs sorts of issues don’t seem likely. I think Bill Howatt nailed it in his post early on when he described it as likely due to one of the “typical electronic causes”.
So now, depending on my level of paranoia, when we travel, I might just flip the stove breakers as well as turn off the water…….