The split sulfur cube does not despawn

 At the moment, a small sulfur cube despawnes when the player moves away, no matter how it comes from. This is a major obstacle to the effort to increase the sulfur cube. If the player leaves before the split sulfur cube grows, all efforts to increase their number will come to nothing. I suggest that split sulfur cubes which come when a sulfur cube in the bucket is killed won't be despawned. This will make the effort to artificially increase the number of sulfur cubes a lot easier.