Hello,
I have created a basic custom BlockChest and corresponding TileEntityChest. I can place the chest in game and add items to it. I can save and exit the current game, reload and the items are still present in the chest. However, if I exit Minecraft entirely, and reload the game, all the items are missing.

Note: This only happens when I use the custom ATileEntityChest. If I use the standard TileEntityChest everything works fine.

Has anyone encountered this before?

I'm using Forge10.12.2.1121 for 1.7.2

AChest.java

public class AChest extends BlockChest {

private final Random field_149955_b = new Random();

public AChest(int p_i45397_1_) {
super(p_i45397_1_);
}

/**
* Called when the block is placed in the world.
*/
public void onBlockPlacedBy(World p_149689_1_, int p_149689_2_, int p_149689_3_, int p_149689_4_, EntityLivingBase p_149689_5_, ItemStack p_149689_6_)
{
Block block = p_149689_1_.getBlock(p_149689_2_, p_149689_3_, p_149689_4_ - 1);
Block block1 = p_149689_1_.getBlock(p_149689_2_, p_149689_3_, p_149689_4_ + 1);
Block block2 = p_149689_1_.getBlock(p_149689_2_ - 1, p_149689_3_, p_149689_4_);
Block block3 = p_149689_1_.getBlock(p_149689_2_ + 1, p_149689_3_, p_149689_4_);
byte b0 = 0;
int l = MathHelper.floor_double((double)(p_149689_5_.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;

if (l == 0)
{
b0 = 2;
}

if (l == 1)
{
b0 = 5;
}

if (l == 2)
{
b0 = 3;
}

if (l == 3)
{
b0 = 4;
}

if (block != this && block1 != this && block2 != this && block3 != this)
{
p_149689_1_.setBlockMetadataWithNotify(p_149689_2_, p_149689_3_, p_149689_4_, b0, 3);
}
else
{
if ((block == this || block1 == this) && (b0 == 4 || b0 == 5))
{
if (block == this)
{
p_149689_1_.setBlockMetadataWithNotify(p_149689_2_, p_149689_3_, p_149689_4_ - 1, b0, 3);
}
else
{
p_149689_1_.setBlockMetadataWithNotify(p_149689_2_, p_149689_3_, p_149689_4_ + 1, b0, 3);
}

p_149689_1_.setBlockMetadataWithNotify(p_149689_2_, p_149689_3_, p_149689_4_, b0, 3);
}

if ((block2 == this || block3 == this) && (b0 == 2 || b0 == 3))
{
if (block2 == this)
{
p_149689_1_.setBlockMetadataWithNotify(p_149689_2_ - 1, p_149689_3_, p_149689_4_, b0, 3);
}
else
{
p_149689_1_.setBlockMetadataWithNotify(p_149689_2_ + 1, p_149689_3_, p_149689_4_, b0, 3);
}

p_149689_1_.setBlockMetadataWithNotify(p_149689_2_, p_149689_3_, p_149689_4_, b0, 3);
}
}

if (p_149689_6_.hasDisplayName())
{
((ATileEntityChest)p_149689_1_.getTileEntity(p_149689_2_, p_149689_3_, p_149689_4_)).func_145976_a(p_149689_6_.getDisplayName());
}
}

/**
* Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
* their own) Args: x, y, z, neighbor Block
*/
public void onNeighborBlockChange(World p_149695_1_, int p_149695_2_, int p_149695_3_, int p_149695_4_, Block p_149695_5_)
{
super.onNeighborBlockChange(p_149695_1_, p_149695_2_, p_149695_3_, p_149695_4_, p_149695_5_);
ATileEntityChest tileentitychest = (ATileEntityChest)p_149695_1_.getTileEntity(p_149695_2_, p_149695_3_, p_149695_4_);

if (tileentitychest != null)
{
tileentitychest.updateContainingBlockInfo();
}
}

public void breakBlock(World p_149749_1_, int p_149749_2_, int p_149749_3_, int p_149749_4_, Block p_149749_5_, int p_149749_6_)
{
ATileEntityChest tileentitychest = (ATileEntityChest)p_149749_1_.getTileEntity(p_149749_2_, p_149749_3_, p_149749_4_);

if (tileentitychest != null)
{
for (int i1 = 0; i1 < tileentitychest.getSizeInventory(); ++i1)
{
ItemStack itemstack = tileentitychest.getStackInSlot(i1);

if (itemstack != null)
{
float f = this.field_149955_b.nextFloat() * 0.8F + 0.1F;
float f1 = this.field_149955_b.nextFloat() * 0.8F + 0.1F;
EntityItem entityitem;

for (float f2 = this.field_149955_b.nextFloat() * 0.8F + 0.1F; itemstack.stackSize > 0; p_149749_1_.spawnEntityInWorld(entityitem))
{
int j1 = this.field_149955_b.nextInt(21) + 10;

if (j1 > itemstack.stackSize)
{
j1 = itemstack.stackSize;
}

itemstack.stackSize -= j1;
entityitem = new EntityItem(p_149749_1_, (double)((float)p_149749_2_ + f), (double)((float)p_149749_3_ + f1), (double)((float)p_149749_4_ + f2), new ItemStack(itemstack.getItem(), j1, itemstack.getItemDamage()));
float f3 = 0.05F;
entityitem.motionX = (double)((float)this.field_149955_b.nextGaussian() * f3);
entityitem.motionY = (double)((float)this.field_149955_b.nextGaussian() * f3 + 0.2F);
entityitem.motionZ = (double)((float)this.field_149955_b.nextGaussian() * f3);

if (itemstack.hasTagCompound())
{
entityitem.getEntityItem().setTagCompound((NBTTagCompound)itemstack.getTagCompound().copy());
}
}
}
}

p_149749_1_.func_147453_f(p_149749_2_, p_149749_3_, p_149749_4_, p_149749_5_);
}

super.breakBlock(p_149749_1_, p_149749_2_, p_149749_3_, p_149749_4_, p_149749_5_, p_149749_6_);
}

public IInventory func_149951_m(World p_149951_1_, int p_149951_2_, int p_149951_3_, int p_149951_4_)
{
Object object = (ATileEntityChest)p_149951_1_.getTileEntity(p_149951_2_, p_149951_3_, p_149951_4_);

if (object == null)
{
return null;
}
else if (p_149951_1_.isSideSolid(p_149951_2_, p_149951_3_ + 1, p_149951_4_, DOWN))
{
return null;
}
else if (func_149953_o(p_149951_1_, p_149951_2_, p_149951_3_, p_149951_4_))
{
return null;
}
else if (p_149951_1_.getBlock(p_149951_2_ - 1, p_149951_3_, p_149951_4_) == this && (p_149951_1_.isSideSolid(p_149951_2_ - 1, p_149951_3_ + 1, p_149951_4_, DOWN) || func_149953_o(p_149951_1_, p_149951_2_ - 1, p_149951_3_, p_149951_4_)))
{
return null;
}
else if (p_149951_1_.getBlock(p_149951_2_ + 1, p_149951_3_, p_149951_4_) == this && (p_149951_1_.isSideSolid(p_149951_2_ + 1, p_149951_3_ + 1, p_149951_4_, DOWN) || func_149953_o(p_149951_1_, p_149951_2_ + 1, p_149951_3_, p_149951_4_)))
{
return null;
}
else if (p_149951_1_.getBlock(p_149951_2_, p_149951_3_, p_149951_4_ - 1) == this && (p_149951_1_.isSideSolid(p_149951_2_, p_149951_3_ + 1, p_149951_4_ - 1, DOWN) || func_149953_o(p_149951_1_, p_149951_2_, p_149951_3_, p_149951_4_ - 1)))
{
return null;
}
else if (p_149951_1_.getBlock(p_149951_2_, p_149951_3_, p_149951_4_ + 1) == this && (p_149951_1_.isSideSolid(p_149951_2_, p_149951_3_ + 1, p_149951_4_ + 1, DOWN) || func_149953_o(p_149951_1_, p_149951_2_, p_149951_3_, p_149951_4_ + 1)))
{
return null;
}
else
{
if (p_149951_1_.getBlock(p_149951_2_ - 1, p_149951_3_, p_149951_4_) == this)
{
object = new InventoryLargeChest("container.chestDouble", (ATileEntityChest)p_149951_1_.getTileEntity(p_149951_2_ - 1, p_149951_3_, p_149951_4_), (IInventory)object);
}

if (p_149951_1_.getBlock(p_149951_2_ + 1, p_149951_3_, p_149951_4_) == this)
{
object = new InventoryLargeChest("container.chestDouble", (IInventory)object, (ATileEntityChest)p_149951_1_.getTileEntity(p_149951_2_ + 1, p_149951_3_, p_149951_4_));
}

if (p_149951_1_.getBlock(p_149951_2_, p_149951_3_, p_149951_4_ - 1) == this)
{
object = new InventoryLargeChest("container.chestDouble", (ATileEntityChest)p_149951_1_.getTileEntity(p_149951_2_, p_149951_3_, p_149951_4_ - 1), (IInventory)object);
}

if (p_149951_1_.getBlock(p_149951_2_, p_149951_3_, p_149951_4_ + 1) == this)
{
object = new InventoryLargeChest("container.chestDouble", (IInventory)object, (ATileEntityChest)p_149951_1_.getTileEntity(p_149951_2_, p_149951_3_, p_149951_4_ + 1));
}

return (IInventory)object;
}
}

private static boolean func_149953_o(World p_149953_0_, int p_149953_1_, int p_149953_2_, int p_149953_3_)
{
Iterator iterator = p_149953_0_.getEntitiesWithinAABB(EntityOcelot.class, AxisAlignedBB.getAABBPool().getAABB((double)p_149953_1_, (double)(p_149953_2_ + 1), (double)p_149953_3_, (double)(p_149953_1_ + 1), (double)(p_149953_2_ + 2), (double)(p_149953_3_ + 1))).iterator();
EntityOcelot entityocelot1;

do
{
if (!iterator.hasNext())
{
return false;
}

EntityOcelot entityocelot = (EntityOcelot)iterator.next();
entityocelot1 = (EntityOcelot)entityocelot;
}
while (!entityocelot1.isSitting());

return true;
}

/**
* Returns a new instance of a block's tile entity class. Called on placing the block.
*/
public TileEntity createNewTileEntity(World p_149915_1_, int p_149915_2_)
{
ATileEntityChest tileentitychest = new ATileEntityChest();
return tileentitychest;
}

public int isProvidingWeakPower(IBlockAccess p_149709_1_, int p_149709_2_, int p_149709_3_, int p_149709_4_, int p_149709_5_)
{
if (!this.canProvidePower())
{
return 0;
}
else
{
int i1 = ((ATileEntityChest)p_149709_1_.getTileEntity(p_149709_2_, p_149709_3_, p_149709_4_)).numPlayersUsing;
return MathHelper.clamp_int(i1, 0, 15);
}
}


}


ATileEntityChest.java

public class ATileEntityChest extends TileEntityChest {
private int cachedChestType;

private boolean func_145977_a(int p_145977_1_, int p_145977_2_, int p_145977_3_)
{
Block block = this.worldObj.getBlock(p_145977_1_, p_145977_2_, p_145977_3_);
return block instanceof BlockChest && ((BlockChest)block).field_149956_a == this.func_145980_j();
}

public void closeInventory()
{
if (this.getBlockType() instanceof BlockChest)
{
--this.numPlayersUsing;
this.worldObj.addBlockEvent(this.xCoord, this.yCoord, this.zCoord, this.getBlockType(), 1, this.numPlayersUsing);
this.worldObj.notifyBlocksOfNeighborChange(this.xCoord, this.yCoord, this.zCoord, this.getBlockType());
this.worldObj.notifyBlocksOfNeighborChange(this.xCoord, this.yCoord - 1, this.zCoord, this.getBlockType());
}
}

public int func_145980_j()
{
if (this.cachedChestType == -1)
{
if (this.worldObj == null || !(this.getBlockType() instanceof BlockChest))
{
return 0;
}

this.cachedChestType = ((BlockChest)this.getBlockType()).field_149956_a;
}

return this.cachedChestType;
}
}