List of bugs with Taller Worlds
Expanding in #1, here is a not comprehensive list of reported bugs with taller worlds. Add a comment if you find more, so I can add them to the list.
MC-207388 -- Issues with chunk rendering when height limit is large ~ Affects negative-height.zip, although this isn't a problem with negative height per se.
MC-207407 -- Villages will always generete at least on y=0
MC-207305 -- Minecraft crashes when trying to generate a custom world with "min_y" set to -512 and "height" set to 512
MC-207366 -- Trying to modify the world height of a world after it's already been generated gives a null pointer exception ~ This is the bug that causes #1.
this is sad because i made a hole into the void on my survival world using bedrock breaking techniques of a 7x7 so i was gonna make a weird dropper map thing