Toggleable Group Checkbox Doesn't Update in Inspector After External Change

[SmiterG]

Tested versions

• Reproducible in: v4.5.beta1.official [46c495c]

System information

Godot v4.5.beta1 - Windows 11 (build 26100) - Multi-window, 1 monitor - Vulkan (Forward+) - dedicated AMD Radeon RX 580 2048SP (Advanced Micro Devices, Inc.; 31.0.21923.1000) - Genuine Intel(R) CPU 0000 @ 2.60GHz (16 threads) - 15.84 GiB memory

Issue description

When using @export_custom with PROPERTY_HINT_GROUP_ENABLE for a toggleable group, the associated checkbox in the Inspector does not update visually when its value is changed externally via a @tool script.

Here is a video of the issue:

unknown_2025.06.21-19.49_3.mp4

Steps to reproduce

1. Create a new Node in a scene (e.g., a Node2D).

2. Attach a new script to this node.

3. Inside the script, define two @export_group.

4. For each group, add an @export_custom variable using PROPERTY_HINT_GROUP_ENABLE.

5. Implement a setter on one of these variables. In the setter, set its own value and also set the other group's variable to the inverse of the current value.

Here's an example script:

@tool
extends Node

@export_group("Test A")
@export_custom(PROPERTY_HINT_GROUP_ENABLE, "") var enable_a: bool = false

@export_group("Test B")
@export_custom(PROPERTY_HINT_GROUP_ENABLE, "") var enable_b: bool = false:
	set(value):
		enable_b = value
		enable_a = !value
		print("Actual Test A status: %s" % !value)

6. Save your scene.

7. Reload the scene.

8. With the node selected in the Scene tree, toggle the Test B checkbox (the one with the setter) multiple times, the Test A will not update unless you deselect the node and select again.

Minimal reproduction project (MRP)

mrp.zip