I was trying to make FallingSand spawners for one of my creations, updating it with the proper NBT tags, when I discovered that the game was loading a LOT of entities and getting laggier and laggier at a high rate. I had the DropItem NBT tag set to 0 to make sure it wouldn't drop any items to prevent lag, and I also had /gamerule doTileDrops false, doTileDrops was not working properly on its own.

What I expected to happen was...:
The FallingSand spawners to work like they did in the previous version.

What actually happened was...:
FallingSand spawners make my game unplayable in a matter of seconds.

Steps to Reproduce:
1. Create a custom FallingSand spawner with NBT editors, world editors, or both.
2. Set the FallingSand to have a "DropItem: 0" tag
3. Watch the "All: #" Rise when blocks start breaking
4. If the blocks still break into items(You have found another bug if they do), do "/gamerule doTilesdrop false" and try again.