The bug
When you create a superflat world and then experience a crash (or force one), the field Level generator options:
stays empty even though a superflat world saves the data also in the generatorOptions
tag of the level.dat
file.
Related issues
Comments


Still (or again) happens for 1.6.61
Can you please change the project of the bug to "Minecraft"

Is this still an issue in 1.16.3 or later?
Fixed in 1.6.48 and maybe earlier