Material UI not responding when updating shader params in tool mode

[GameDevLlama]

Godot version:
3.2.2 Beta 3 Official

OS/device including version:
Windows 10

Issue description:
Having a sprite node with a tool script attached to it:

tool
extends Sprite

func _process(delta: float) -> void:
	material["shader_param/Uniform"] = ArbitraryValue

And having a material which is using a VisualShader, the editor UI for the material shader will not be clickable anymore. This is preventing the shader being opened via the sprites material property panel.

Steps to reproduce:
add a sprite to the scene.
add a new material to the sprite with a visual shader.
Add a uniform to the visual shader and use it somehow. (a color uniform for example)
also attach a new script with tool mode in which updates a material uniform in the process function.
Reopen the scene, so that the tool starts processing.
Try opening the Visual script via the sprite's property panels.

Minimal reproduction project:

[pavlexander]

I apologize if this has already been fixed or a different use-case but I came looking for the same issue in godot 4 and apparently the issue was that I needed to rebuild the project and reload (close and open) the scene! Reopening is very important. I think that by default the editor is not tracking the script changes so you have to force reload it. I would actually file an issue for the particular problem..

Regardless, I am not sure if my problem is applicable, but here is the completely working editor-friendly shader update script in C# in godot 4.

[Tool]
public partial class Grid : Node2D
{
    private ColorRect _colorRect;

    public override void _Ready()
    {
        _colorRect = GetNode<ColorRect>("ColorRect");

        UpdateShaderSize();

        _colorRect.Connect(ColorRect.SignalName.Resized, Callable.From(_on_SizeChanged));
    }

    private void _on_SizeChanged()
    {
        UpdateShaderSize();
    }

    private void UpdateShaderSize()
    {
        if (_colorRect.Material is ShaderMaterial shaderMaterial)
        {
            shaderMaterial.SetShaderParameter("node_size", _colorRect.Size);
        }
    }
}