ContainerFix

If you want to fix this issue for your mod, override Container#canInteractWith. In there, you would do a check if the TileEntity of the container still exists in the world, and if the player is close enough to the Block. This would mimic vanilla behavior.

Example:

@Override
public boolean canInteractWith(EntityPlayer player) 
{ 
    return te.world.getTileEntity(te.getPos()) == te && player.getDistanceSq(te.pos.add(0.5, 0.5, 0.5)) <= 64;
}