[1.16.5] Container close item resets

[Ratsiel]

So I have a problem at the moment, I have created a block, TileEntity, Container and ContainerScreen that works so far everything.

If I then rename an item in the container screen by code and close the screen, the item is reset.

I hope that someone can help me with this.

~Ratsiel

[Draco18s]

$100 says you didn't bother telling the server that you wanted to change the item's name when you did things on the client side gui.

[Ratsiel]

Well i found my error.