When I select one of my world maps, it goes to the loading screen but stays at 0% and won't go beyond that. I can't exit out of Minecraft or forcibly quit the application and I have to shut down my laptop. I can go into my other maps and it loads just fine, it only happens with this one in particular. The last time I was on the map, my game and my laptop froze and I had to restart it. This has happened many times before and I had never had a problem logging back in afterwards.