json gets parsed, serialized and deserialized a couple times along the way and the way it's handled is slightly different between pasting in the 2 boxes

[4ChanMeta]

Version Information

Minecraft version: 1.12.2
Forge version: 14.23.5.2859
Other mods (if applicable):

Steps to reproduce:

1. https://pastebin.com/E9V9KcLJ
2. Compile it because this one is ancient, paste it into smaller box but it doesn't work
3. compile it again and paste it into big box and it works

Expected Behavior: works

Actual Behavior: doesn't work until you paste it into big box

Link to crash log (if applicable - use a site such as hastebin:
Bizarre MC World.txt
message (8).txt
message (9).txt
debug.log