Desert churches have sandstone stairs inside of a cobblestone building

The bug

Churches generate with cobblestone walls, but with sandstone stairs inside which looks highly unnatural (see screenshot). The blocks should be consistent.
This might be caused by the game attempting to replace every cobblestone stair in the village with a sandstone stair, including stairs inside the church.

How to reproduce

Seed: 7816721171111233935
Coordinates: /tp 275 65 200