I flew around below bedrock whn suddenly all the bedrock in this area dissapeared, and along with it every other block for all those chunks. At first i thought it was just the world not loading in properly but that's not the case, all these chunks are just completely air blocks. One thing to note: the world was updated from 1.12.2 to 1.17.1 shortly before i started flying around.

It seems i did an oopsie and added the world as a folder. Here is a .zip of the world: https://www.dropbox.com/s/bi7gbhk7leh00w4/New%20World.zip?dl=0