Components falling into the ground
Grinding down blocks on planets that are directly in contact with the floor makes any material inside them just fall through the ground. The same is true while grinding down e.g. a vehicle wreckage and when the inventory gets full, if a block is grinded down then, the components that wouldn't fit the invetory would be just dropped on the ground, instead, it just falls though it. This happens much more often with small blocks because of their small size; because small blocks and terrain are so close together, it seems that any component spawned on its place is actually spawned inside the terrain, thus, why they fall right through the ground.