This is probably the weirdest issue i have ever reported....
Somehow cave generation in dimensions seem to add a new cave gen whenever you re-enter the dimension.... I know, really weird.
I have attached the workspace so you can take a look.
You can enter the dimension by walking through a block called "sugarenia portal block"
it's normal on the left and it gets worse the further you go....... (This is in minecraft not mcreator, Nothing in the mod has changed between everytime i re-entered the dimension)
This is when i started to notice it. the ground is like 90% cave.
I have also tested this in mcreator and it let to the same issue.
I hope this is fixable.