[1.7.10] Unable to interact with entity after death

[cubex2]

I have a custom entity that opens a gui when the player right clicks on it. This works all fine but if you try to right click it again after the player died, you can't click the entity anymore. If you reopen the world, it works again. I'm I doing something wrong?

 

int entityId = EntityRegistry.findGlobalUniqueEntityId();
EntityRegistry.registerGlobalEntityID(EntityCorpse.class, "Corpse", entityId, 2342, 3246);
EntityRegistry.registerModEntity(EntityCorpse.class, "Corpse", entityId, PXYMain.instance, 64, 1, true);

public class EntityCorpse extends EntityLivingBase
{
    public InventoryCorpse inventory = new InventoryCorpse();

    public EntityCorpse(World world)
    {
        super(world);
        setHealth(getMaxHealth());
        this.setSize(0.9F, 2F);
    }

    @Override
    public void readEntityFromNBT(NBTTagCompound nbt)
    {
        super.readEntityFromNBT(nbt);
        inventory.readFromNBT(nbt);
    }

    @Override
    public ItemStack getHeldItem()
    {
        return null;
    }

    @Override
    public ItemStack getEquipmentInSlot(int p_71124_1_)
    {
        return null;
    }

    @Override
    public void setCurrentItemOrArmor(int p_70062_1_, ItemStack p_70062_2_)
    {

    }

    @Override
    public ItemStack[] getLastActiveItems()
    {
        return new ItemStack[0];
    }

    @Override
    public void writeEntityToNBT(NBTTagCompound nbt)
    {
        super.writeEntityToNBT(nbt);
        inventory.writeToNBT(nbt);
    }

    @Override
    public boolean interactFirst(EntityPlayer player)
    {
        if (!player.worldObj.isRemote)
        {
            new PacketOpenCorpseGuiServer.Handler().handleMessage(new PacketOpenCorpseGuiServer(this), (EntityPlayerMP) player);
        }
        return true;
    }
}

[cubex2]

The packet is not important. I could replace that with a simple println. The problem is interactFirst isn't even called. I also noticed that the raytrace goes right through the entity.

[cubex2]

I removed the global ID. Still doesn't work.

[cubex2]

This seems to happen to vanilla creatures as well. Pushing them away a couple times fixes it but that's no solution as my entity will be uncollidable.