The stronghold generates pretty buggy when in the new 1.17 caves and cliffs cave gen.

I was exploring the new caves and decided to check out a stronghold and its generation seemed to not fit in with the new caves. many parts of the structure were floating and in the open! I do not believe that this is an intended feature! I will attach a link to a video of the strange stronghold generation.

https://youtu.be/UvaR7QZIcFg