[1.15.1] addItemStackToInventory, special case doesn't work

[Kander16]

Hi,

 

I'm currently creating a 'containerItem', an item which has a specified containerItem set and if used (eaten, for example) it returns this containerItem into the inventory of the player. I made this class to get arbitrary items to work like a SoupItem (so that it can return an arbitrary item back in inventory. Everything seems to work fine except for one special case, and I don't know where to look. My code: https://pastebin.com/gwX2yDiJ

 

The different possible cases:

 

• If the item you were eating is gone:
  • If the containerItem is stackable and the player has the containerItemStack in its inventory, use player.addItemStackToInventory to add the containerItem to the current stack
    • This is the one case that doesn't work sometimes. If I am eating an item with a count of 1, and had a containerItem already in my inventory with the maxStackSize reached (in my case, 64), the item completely vanishes. Any idea of what I'm doing wrong here? 
  • In any other case, just return the containerItemStack to get the containerItem
• If the item you were eating isn't gone:
  • player.addItemStackToInventory (to not replace the item you were eating)

 

Thanks in advance,

 

Kander16