Direct item update by updateItem not working

[devnatan]

Is there an existing issue for this?

• I have searched the existing issues

🐛 Describe the bug

slot(8, new ItemStack(Material.getMaterial("REDSTONE")))
    .cancelOnClick()
    .onUpdate(update -> update.updateItem(wrapper -> wrapper.asBukkitItem().setAmount(update.paginated().getPage())));

An exception being thrown because wrapper is null even with fallback item.

✔️ Expected behavior

It was expected that the item that was rendered would be updated when the slot is updated, but instead an exception is being thrown.

👣 Steps to Reproduce

No response

💻 Platform

• Bukkit
• Sponge
• Other

⭐ Versions

IF v2.5.4-beta

✍️ Additional context

Failed to execute click pipeline
java.lang.NullPointerException: Cannot invoke "me.saiintbrisson.minecraft.ItemWrapper.asBukkitItem()" because "wrapper" is null
        at me.saiintbrisson.minecraft.Test2.lambda$new$1(InventoryFramework.java:40) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.AbstractViewSlotContext.updateItem(AbstractViewSlotContext.java:128) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.Test2.lambda$new$2(InventoryFramework.java:40) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.AbstractView.lambda$update$4(AbstractView.java:771) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.AbstractVirtualView.runCatching(AbstractVirtualView.java:383) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.AbstractView.update(AbstractView.java:771) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.pipeline.interceptors.UpdateInterceptor.intercept(UpdateInterceptor.java:39) ~[inventory-framework-2.5.4-beta-all.jar:?]
        at me.saiintbrisson.minecraft.pipeline.interceptors.UpdateInterceptor.intercept(UpdateInterceptor.java:14) ~[inventory-framework-2.5.4-beta-all.jar:?]