InventoryMenu#registerChange does not appear to be called

[carbotaniuman]

Affected Product(s)

SpongeVanilla

Version

1.16.5-8.1.0-RC1235

Operating System

Windows

Java Version

17.0.2/64-bit (Eclipse Adoptium)

Plugins/Mods

None (other than my own)

Describe the bug

InventoryMenu's register change listener appears to never run, no matter what I do (left click, shift click into, swap manually, swap with key).

How I created my inventory:

public ViewableInventory guiTools() {
	var emptyFill = ItemStack.builder().itemType(ItemTypes.GRAY_STAINED_GLASS_PANE)
		.add(org.spongepowered.api.data.Keys.DISPLAY_NAME, Component.empty()).build().createSnapshot();

	var base = Inventory.builder().slots(16).completeStructure().plugin(container).build();
	var inventory = ViewableInventory.builder().type(ContainerTypes.GENERIC_9X4)
		.slotsAtIndizes(base.slots(), List.of(2, 11, 20, 29, 10, 12, 5, 6, 14, 15, 16, 23, 24, 25, 32, 33))
		.fillDummy().item(emptyFill).completeStructure().plugin(container).build();

	inventory.set(2, emptyFill);

	return inventory;
}

I have the following code in a InteractEntityEvent listener, but it probably can go anywhere:

public void modifyEntity(InteractEntityEvent.Secondary event) {
	var inv = guiTools(stand);
	var menu = inv.asMenu();
	menu.setReadOnly(false);
	menu.registerChange((a, b, c, d, e , f) -> {
		System.out.println("FF");
		return true;
	});
	menu.registerSlotClick((a, b, c, d, e) -> {
		System.out.println("GG");
		return true;
	});
	menu.open(p);
}

I have verified that the inventory menu works by seeing the GG in the output logs, but I do not see any FF.

Link to logs

No response