### 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_stylebox("normal", "InspectorActionButton", style_inspector_action);
	style_inspector_action = style_widget_hover->duplicate();
	style_inspector_action->set_content_margin(SIDE_RIGHT, ACTION_BUTTON_EXTRA_MARGIN);
	theme->set_stylebox("hover", "InspectorActionButton", style_inspector_action);
	style_inspector_action = style_widget_pressed->duplicate();
	style_inspector_action->set_content_margin(SIDE_RIGHT, ACTION_BUTTON_EXTRA_MARGIN);
	theme->set_stylebox("pressed", "InspectorActionButton", style_inspector_action);
	style_inspector_action = style_widget_disabled->duplicate();
	style_inspector_action->set_content_margin(SIDE_RIGHT, ACTION_BUTTON_EXTRA_MARGIN);
	theme->set_stylebox("disabled", "InspectorActionButton", style_inspector_action);
	theme->set_constant("h_separation", "InspectorActionButton", ACTION_BUTTON_EXTRA_MARGIN);
	
	theme->set_type_variation("EditorLogFilterButton", "Button");
	
	theme->set_color("icon_pressed_color", "EditorLogFilterButton", icon_normal_color);
	
	theme->set_color("icon_normal_color", "EditorLogFilterButton", icon_disabled_color);
	
	
	Ref<StyleBoxFlat> editor_log_button_pressed = style_widget_pressed->duplicate();
	editor_log_button_pressed->set_border_width(SIDE_BOTTOM, 2 * EDSCALE);
	editor_log_button_pressed->set_border_color(accent_color);
	theme->set_stylebox("pressed", "EditorLogFilterButton", editor_log_button_pressed);
	
	const Color dim_light_color = icon_normal_color.darkened(0.24);
	const Color dim_light_highlighted_color = icon_normal_color.darkened(0.18);
	Ref<StyleBox> sb_empty_borderless = make_empty_stylebox();
	theme->set_type_variation("PreviewLightButton", "Button");
	
	theme->set_color("icon_normal_color", "PreviewLightButton", dim_light_color);