Travelling through the world I came across strange dungeon spawning behavior with floating generation, and an open to air zombie spawner.

Seed: 5800667603343744096
Co-ords: -305, 100, -52
Mod version: 2.0.2

Images attatched:

This similar generation also appears at the following coordinates in the same seed: -328, 70, -985

AstralRails datapack has been adjusted to account for this and prevent buggy worldgen from happening now