### 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("panel", "PopupDialog", style_popup);
	
	Ref<StyleBoxFlat> style_popup_menu = style_popup->duplicate();
	
	
	
	style_popup_menu->set_content_margin_individual(EDSCALE, 2 * EDSCALE, EDSCALE, 2 * EDSCALE);
	
	style_popup_menu->set_border_width_all(EDSCALE);
	if (draw_extra_borders) {
		style_popup_menu->set_border_color(extra_border_color_2);
	} else {
		style_popup_menu->set_border_color(dark_color_2);
	}
	theme->set_stylebox("panel", "PopupMenu", style_popup_menu);
	Ref<StyleBoxFlat> style_menu_hover = style_widget_hover->duplicate();
	
	style_menu_hover->set_corner_radius_all(0);
	theme->set_stylebox("hover", "PopupMenu", style_menu_hover);
	theme->set_stylebox("separator", "PopupMenu", style_popup_separator);
	theme->set_stylebox("labeled_separator_left", "PopupMenu", style_popup_labeled_separator_left);
	theme->set_stylebox("labeled_separator_right", "PopupMenu", style_popup_labeled_separator_right);
	theme->set_color("font_color", "PopupMenu", font_color);
	theme->set_color("font_hover_color", "PopupMenu", font_hover_color);
	theme->set_color("font_accelerator_color", "PopupMenu", font_disabled_color);
	theme->set_color("font_disabled_color", "PopupMenu", font_disabled_color);
	theme->set_color("font_separator_color", "PopupMenu", font_disabled_color);
	theme->set_color("font_outline_color", "PopupMenu", font_outline_color);
	theme->set_icon("checked", "PopupMenu", theme->get_icon(SNAME("GuiChecked"), SNAME("EditorIcons")));
	theme->set_icon("unchecked", "PopupMenu", theme->get_icon(SNAME("GuiUnchecked"), SNAME("EditorIcons")));