Game crashes and then won't load world

I've had this occur on two different Window's 10 edition world's I've played in the past two days. I will generate a new world and play for a while and then the game will freeze and then crash. I restart Minecraft, try to reload the world, and it stays on the Generating World screen, but never loads the world where the game that crashed. I can load other games that haven't crashed yet. As soon as it crashes, can't load the world.