This world is an old world with experimental gameplay toggled. The world was fine, but as long as I go a part of the world (near the center of the world) where there are a lot of buildings, the game freezes and crashes. Other parts of the world are fine. This happens to all my devices as long as many other's devices including iOS, Android and Windows 10.

I am not sure if it is caused by rendering problems or because there are too many buildings. But that part of the world was accessible before the beta update. I am pretty sure it is a new bug.

[UPDATE]
I also found that if i turn down my simulation distance, the crashing area will become smaller. I think there may be some redstone problems or chunk loading problems happening there.

Here is the world file uploaded to google drive (4 MAY 2018) : https://drive.google.com/drive/folders/1Fw0SN_Q9gLtoWMnUalYUjp4SQKBrnFvV?usp=sharing