### 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)

Ref<StyleBoxFlat> style_widget_focus_viewport = style_widget_focus->duplicate();
	style_widget_focus_viewport->set_border_color(accent_color * Color(1, 1, 1, 0.5));
	theme->set_stylebox("FocusViewport", "EditorStyles", style_widget_focus_viewport);
	
	Ref<StyleBoxFlat> style_menu = style_widget->duplicate();
	style_menu->set_draw_center(false);
	style_menu->set_border_width_all(0);
	theme->set_stylebox("panel", "PanelContainer", style_menu);
	theme->set_stylebox("MenuPanel", "EditorStyles", style_menu);
	
	Ref<StyleBoxFlat> style_canvas_editor_info = make_flat_stylebox(Color(0.0, 0.0, 0.0, 0.2));
	style_canvas_editor_info->set_expand_margin_all(4 * EDSCALE);
	theme->set_stylebox("CanvasItemInfoOverlay", "EditorStyles", style_canvas_editor_info);
	
	
	
	
	Ref<StyleBoxFlat> toolbar_stylebox = memnew(StyleBoxFlat);
	toolbar_stylebox->set_bg_color(accent_color * Color(1, 1, 1, 0.1));
	toolbar_stylebox->set_corner_radius(CORNER_TOP_LEFT, corner_radius * EDSCALE);
	toolbar_stylebox->set_corner_radius(CORNER_TOP_RIGHT, corner_radius * EDSCALE);
	toolbar_stylebox->set_anti_aliased(false);
	
	toolbar_stylebox->set_border_color(accent_color);
	toolbar_stylebox->set_border_width(SIDE_BOTTOM, Math::round(2 * EDSCALE));
	toolbar_stylebox->set_content_margin(SIDE_BOTTOM, 0);
	theme->set_stylebox("ContextualToolbar", "EditorStyles", toolbar_stylebox);
	
	theme->set_stylebox("ScriptEditorPanel", "EditorStyles", make_empty_stylebox(default_margin_size, 0, default_margin_size, default_margin_size));
	theme->set_stylebox("ScriptEditorPanelFloating", "EditorStyles", make_empty_stylebox(0, 0, 0, 0));