### Godot version

v4.0.1.stable.official [cacf49999]

### System information

Windows 10

### Issue description

If you use Sprite2D with a regular CompressedTexture and set a Region on it, then use a Sprite2D with a CanvasTexture and a different texture in the diffuse, and try to set a Region, the Region Editor display will show the texture from the first sprite2D node. I would expect it to show the diffuse texture from the current Sprite2D.
![image](https://user-images.githubusercontent.com/7292421/231493673-4eb152e0-81ed-4248-8465-71242c291cd2.png)
![image](https://user-images.githubusercontent.com/7292421/231493749-6173993b-e77c-4899-961e-9a055c07e351.png)




### Steps to reproduce

Make a sprite2D node
add a texture to it 
set Region to Enabled
click Edit Region under 'Region'
set any region

Make another sprite2D node
add a CanvasTexture to it
add a different texture to the Diffuse part
set Region to Enabled
click Edit Region under 'Region'
see wrong texture

### Minimal reproduction project

[RegionEditorBug.zip](https://github.com/godotengine/godot/files/11212626/RegionEditorBug.zip)

theme->set_color("icon_focus_color", "PreviewLightButton", dim_light_color);
	theme->set_color("icon_pressed_color", "PreviewLightButton", icon_normal_color);
	theme->set_color("icon_hover_pressed_color", "PreviewLightButton", icon_normal_color);
	
	theme->set_color("icon_hover_color", "PreviewLightButton", dim_light_highlighted_color);
	theme->set_stylebox("normal", "PreviewLightButton", sb_empty_borderless);
	theme->set_stylebox("hover", "PreviewLightButton", sb_empty_borderless);
	theme->set_stylebox("focus", "PreviewLightButton", sb_empty_borderless);
	theme->set_stylebox("pressed", "PreviewLightButton", sb_empty_borderless);
	
	{
		theme->set_type_variation("ProjectTag", "Button");
		Ref<StyleBoxFlat> tag = style_widget->duplicate();
		tag->set_bg_color(dark_theme ? tag->get_bg_color().lightened(0.2) : tag->get_bg_color().darkened(0.2));
		tag->set_corner_radius(CORNER_TOP_LEFT, 0);
		tag->set_corner_radius(CORNER_BOTTOM_LEFT, 0);
		tag->set_corner_radius(CORNER_TOP_RIGHT, 4);
		tag->set_corner_radius(CORNER_BOTTOM_RIGHT, 4);
		theme->set_stylebox("normal", "ProjectTag", tag);
		tag = style_widget_hover->duplicate();
		tag->set_corner_radius(CORNER_TOP_LEFT, 0);
		tag->set_corner_radius(CORNER_BOTTOM_LEFT, 0);
		tag->set_corner_radius(CORNER_TOP_RIGHT, 4);
		tag->set_corner_radius(CORNER_BOTTOM_RIGHT, 4);
		theme->set_stylebox("hover", "ProjectTag", tag);
		tag = style_widget_pressed->duplicate();
		tag->set_corner_radius(CORNER_TOP_LEFT, 0);
		tag->set_corner_radius(CORNER_BOTTOM_LEFT, 0);
		tag->set_corner_radius(CORNER_TOP_RIGHT, 4);
		tag->set_corner_radius(CORNER_BOTTOM_RIGHT, 4);