Freeze when i enter some area.

I’m Japnese, I’m not good at English. 

In My realm, when I enter some area, minecraft frozen.

I try to reboot the game, but I can’t open the realm.

(the game frozen on purple screen )

I tried many times, and I could enter the realm.

but,i lost my items and experience point.

And Now, it happens same thing.

i entered the same area, and froze, cannot open the realm.

Please fix this bugs.