Once I wanted to get rid of my own item, so I put it in on the delete item button. But the item didn't delete, rather, it stuck to the button. See the illustration below.

Deleting the world and recreating it didn't help. Restarting Minecraft didn't help. Even removing and re-adding the item to the game didn't work. Why did this happen?

FYI, my item opens a GUI on right click. My mod maintains 100% server compatibility.

Try posting your item's code, it could be possibly linked to the issue.

 

If you don't want to, then try checking out how the delete slot works. Maybe your code is somehow preventing that code from working

Try posting your item's code, it could be possibly linked to the issue.

 

If you don't want to, then try checking out how the delete slot works. Maybe your code is somehow preventing that code from working

It probably has nothing to do with it, but here:

package io.github.anon10w1z.craftPP.items;

import io.github.anon10w1z.craftPP.main.CraftPlusPlus;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

/**
* A portable crafting pad that allows you to craft items on the go
*/
public class ItemCraftingPad extends Item {
public ItemCraftingPad() {
	super();
	this.setUnlocalizedName("craftingPad");
	this.setCreativeTab(CreativeTabs.tabInventory);
}

@Override
public ItemStack onItemRightClick(ItemStack itemstack, World world, EntityPlayer player) {
	if (player.inventory.hasItem(CppItems.recipe_book) || player.capabilities.isCreativeMode)
		player.openGui(CraftPlusPlus.instance, 0, world, 0, 0, 0);
	return itemstack;
}
}

Hi

You are opening your GUI on both the client and server. Only the client needs to know about this:

if(world.isRemote())

Calling openGui on a EntityPlayerMP doesn't do anything so it doesn't matter.

Okay then, but is that even relevant to my bug?