When a desert or beach biome collides on a cliff, stone is not replaced by sand blocks

The Bug

When a desert or beach biome collides on a cliff, stone is not replaced by sand blocks.

How to reproduce

1.Teleport to coordinates 8454 106 45925 (Seed:545736546)
2.Observe
In my opinion, this generation is not intentional. It looks a little weird. In the screenshots I have attached how I would expect to see this place.