Affects Version/s: Minecraft 1.13.1
Fix Version/s: None
Environment:Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_181, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
CPU: AMD E2-2000 APU with Radeon(tm) HD Graphics
RAM: 4.00GB (3.58GB Available)
I opened the LAN world and enabled cheating. then I switched to spectator mode.
I found a zombie spawner close to x=70.11, y=23.68, z=208.51, i tried to get back to the home close to the spawn. then crashed.
after crash, I tried to optimize the world in the "edit" button and join the world. it didn't crash but it shows nothing except the blue sky.