I don't think this is a bug...
More information: Upon loading world in MCEdit, MCEdit crashes... Something is wrong with chunk 9,9, and there is no way that I know of to delete it. Something seems to be crashing due to NBT data, and the only things were the command blocks in that area. I am pasting the commands which I have saved below
/execute as @a[limit=1,nbt={slot:-106b,id:"minecraft:crossbow",Count:1b,tag:{display:{Name:"{\"text\":\"Portal Gun\",\"color\":\"dark_aqua\",\"bold\":\"true\",\"italic\":\"false\"}"},Enchantments:[{lvl:5,id:"minecraft:quick_charge"}],Damage:0},Unbreakable:1b}] run say hi
Affects 19w07a
Yes, will attach right now. From further inspection the chunk seems to have glitched❓ in NBT explorer I have singled out the chunk file, it is 9,9 if that helps at all, and the program crashes on expansion of the file.
If more info is requested I will be happy to send some. Im going to delete my inv. to see if that helps. Thanks!
It is no longer an issue in 1.14.3 Pre-Release 2. World is working fine.