Mineshaft halls generating on top of each other fail to properly generate plank floor, causing rails to float

The Bug

When a mineshaft generates over one another it can fail to generate the planks for the floor above, occasionally causing floating rails to generate

Reproduce

Seed: 9142476710151629682
Coordinates: /execute in minecraft:overworld run tp @s -1222.28 68.00 -10281.40 -124.56 48.06

Expected Result

The planks would generate as normal