### 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("font_outline_color", "MenuButton", font_outline_color);
	theme->set_constant("outline_size", "MenuButton", 0);
	theme->set_stylebox("MenuHover", "EditorStyles", style_widget_hover);
	
	theme->set_stylebox("normal", "Button", style_widget);
	theme->set_stylebox("hover", "Button", style_widget_hover);
	theme->set_stylebox("pressed", "Button", style_widget_pressed);
	theme->set_stylebox("focus", "Button", style_widget_focus);
	theme->set_stylebox("disabled", "Button", style_widget_disabled);
	theme->set_color("font_color", "Button", font_color);
	theme->set_color("font_hover_color", "Button", font_hover_color);
	theme->set_color("font_hover_pressed_color", "Button", font_hover_pressed_color);
	theme->set_color("font_focus_color", "Button", font_focus_color);
	theme->set_color("font_pressed_color", "Button", accent_color);
	theme->set_color("font_disabled_color", "Button", font_disabled_color);
	theme->set_color("font_outline_color", "Button", font_outline_color);
	theme->set_color("icon_normal_color", "Button", icon_normal_color);
	theme->set_color("icon_hover_color", "Button", icon_hover_color);
	theme->set_color("icon_focus_color", "Button", icon_focus_color);
	theme->set_color("icon_pressed_color", "Button", icon_pressed_color);
	theme->set_color("icon_disabled_color", "Button", icon_disabled_color);
	theme->set_constant("h_separation", "Button", 4 * EDSCALE);
	theme->set_constant("outline_size", "Button", 0);
	const float ACTION_BUTTON_EXTRA_MARGIN = 32 * EDSCALE;
	theme->set_type_variation("InspectorActionButton", "Button");
	Color color_inspector_action = dark_color_1.lerp(mono_color, 0.12);
	color_inspector_action.a = 0.5;
	Ref<StyleBoxFlat> style_inspector_action = style_widget->duplicate();
	style_inspector_action->set_bg_color(color_inspector_action);
	style_inspector_action->set_content_margin(SIDE_RIGHT, ACTION_BUTTON_EXTRA_MARGIN);