Surface dungeons generating without spawner, chests, and most of floor

Dungeons generating on the surface (usually desert) do not have spawner, chests, or most of flooring. The only mossy cobble/regular cobble of floor that generates is where spawner and chests should have generated or under the cobble walls. I have seen this 6 or 7 times now across 4 new worlds in single player since 14w02c. Here are two example pic sets from my latest world seed -7829811913816383786 showing before and after clearing sand.