I have a world I started on April 17th 2016 which was working fine up till 16.0. Now I have killed an elder guardian and when I got back to my home base and saved the game crashed. I came back in and my world is frozen. I reloaded a backup from two days previous, went back to the ocean monument and killed two guardians. I needed more XP so I was on my way back to my main base and my zombie farm when it froze again. So I created a completely new world on 10/29/2016 and now that world is frozen. As soon as I load the worlds they go through the generating world and sits on a nearly blank screen with whatever is in my hand showing.

Now that I think about it, both of these incidents happened after I go killed by zombies from a spawner which I was rushing back to so I could recover my items (Spawners spawn WAY to fast, but that's another story)