### 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)

category_bg->set_border_color(prop_category_color);
	theme->set_stylebox("bg", "EditorInspectorCategory", category_bg);
	
	Ref<StyleBoxFlat> style_itemlist_bg = style_default->duplicate();
	style_itemlist_bg->set_bg_color(dark_color_1);
	if (draw_extra_borders) {
		style_itemlist_bg->set_border_width_all(Math::round(EDSCALE));
		style_itemlist_bg->set_border_color(extra_border_color_2);
	} else {
		style_itemlist_bg->set_border_width_all(border_width);
		style_itemlist_bg->set_border_color(dark_color_3);
	}
	Ref<StyleBoxFlat> style_itemlist_cursor = style_default->duplicate();
	style_itemlist_cursor->set_draw_center(false);
	style_itemlist_cursor->set_border_width_all(border_width);
	style_itemlist_cursor->set_border_color(highlight_color);
	Ref<StyleBoxFlat> style_itemlist_hover = style_tree_selected->duplicate();
	style_itemlist_hover->set_bg_color(highlight_color * Color(1, 1, 1, 0.3));
	style_itemlist_hover->set_border_width_all(0);
	theme->set_stylebox("panel", "ItemList", style_itemlist_bg);
	theme->set_stylebox("focus", "ItemList", style_widget_focus);
	theme->set_stylebox("cursor", "ItemList", style_itemlist_cursor);
	theme->set_stylebox("cursor_unfocused", "ItemList", style_itemlist_cursor);
	theme->set_stylebox("selected_focus", "ItemList", style_tree_focus);
	theme->set_stylebox("selected", "ItemList", style_tree_selected);
	theme->set_stylebox("hovered", "ItemList", style_itemlist_hover);
	theme->set_color("font_color", "ItemList", font_color);
	theme->set_color("font_hovered_color", "ItemList", mono_color);
	theme->set_color("font_selected_color", "ItemList", mono_color);
	theme->set_color("font_outline_color", "ItemList", font_outline_color);