I just picked up the latest build as I have not played most of the pre-release. When you are doing the beginning tutorial, the game play mechanics still tick, even though you are running through tutorial menus. If the user steps away for a bit, they can come back to a bunch of dead NPCs. I thought the game paused while between things, or at least had the NPCs in a psuedo godmode. When I returned to my cute little tombstones, I was still in a placement phase of an object and I could not back out of it (was making the carpenter stuff).
All gameplay mechanics should understand that tutorials should not kill the villagers, but leave them in a psuedo godmode until you are done teaching the player what to do. #TutorialVillagerLivesMatter