Igloos can generate floating

The Bug:

Igloos can generate floating.

Here is an example:

Seed: 1181589361754893118
Coordinates: /execute in minecraft:overworld run tp @s 93517.71 108.00 -2896.26 317.96 -6.43

Steps to Reproduce:

1. Generate a world with the seed provided above and teleport to the given coordinates.
2. Look closely at how the igloo has generated.
3. Take note as to whether or not igloos can generate floating.

Observed Behavior:

Igloos can generate floating.

Expected Behavior:

Igloos would not be able to generate floating. Instead, they should fill the air below them with some kind of block or just not be able to spawn floating altogether.