Don't take it to heart, @Janet-and-Mark0 . As you say, it is an automated response, and host cancellations are serious business. The system cannot tell if you did it to go on holiday or to go to a funeral.
I know if it was anything else, you would have jumped on that calendar and blocked the days you needed. But when a good friend's child dies, the last thing on your mind is hosting.
You can reply to that automated review if you like with something that will reassure future guests. Something like, "We cancelled to attend a funeral, and we are grateful that Joy was so understanding."
Very sorry for your loss.