[1.14.2 - 26.0.21] Strange container behavior

[KingIceCream]

I am using
forge 1.14.2-26.0.21
mappings 20190612

 

I was updating one of my 1.12.2 mods to 1.14.2, and I came across some strange behavior with my container. It duplicates when you move items around and when you try to grab an item from the player's hotbar, the gameHere is a video of it

 

Here are the logs: https://pastebin.com/em2KhqtR

Here is the code on GitHub (the 1.14.2 folder is the mod folder) https://github.com/KingParity/BetterPets

 

I didn't register the container because this container is just like the horse's container, which was never registered.

Edited June 12, 2019 by KingIceCream

[KingIceCream]

So I solved the issue. I HAD to register the container and bind the GUI, which was a pain since I needed the entity's inventory and the entity itself in the container class, and I needed the entity in my GUI class. I still don't understand why it gave me this strange behavior in the first place though.