Affects Version/s: Minecraft 1.8.9, Minecraft 16w06a, Minecraft 16w07a, Minecraft 16w40a, Minecraft 1.12.1, Minecraft 1.12.2
Fix Version/s: Minecraft 1.13.2
Preset code offset in superflat customization GUI is not reset, causing text to be pushed too far to the left.
- Open the presets screen of superflat mode
- Click a preset whatever you like;
→ You would see just a part of the code and you can get the full code back by pressing button "◀" or click the left side of the text box.
If the code is just fine, click another preset until you could see the glitch.