ItemStack with Capabilities losing contents

[Lance5057]

I have an item that has a single slot inside for putting armor in. In SSP when you add the armor inside it sometimes loses its contents randomly, while in SMP it loses its contents every time the item is moved or put on and I have no idea why.

 

Code

 

Is there something I don't have that prevents the contents from randomly disappearing?

[Draco18s]

ok, this is just awful code, right here:

https://github.com/Lance5057/Tinkers-Defense/blob/master/src/main/java/lance5057/tDefense/TinkersDefense.java#L60

I shouldn't even have to explain why.

[Lance5057]

public void init(FMLInitializationEvent e) {
	NetworkRegistry.INSTANCE.registerGuiHandler(this, proxy);
	...

I changed it to reflect a tutorial but the item still doesn't always save it's contents.

[Lance5057]

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[Lance5057]

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