### 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("ScriptEditor", "EditorStyles", make_empty_stylebox(0, 0, 0, 0));
	
	Ref<StyleBoxFlat> style_launch_pad = make_flat_stylebox(dark_color_1, 2 * EDSCALE, 0, 2 * EDSCALE, 0, corner_width);
	style_launch_pad->set_corner_radius_all(corner_radius * EDSCALE);
	theme->set_stylebox("LaunchPadNormal", "EditorStyles", style_launch_pad);
	Ref<StyleBoxFlat> style_launch_pad_movie = style_launch_pad->duplicate();
	style_launch_pad_movie->set_bg_color(accent_color * Color(1, 1, 1, 0.1));
	style_launch_pad_movie->set_border_color(accent_color);
	style_launch_pad_movie->set_border_width_all(Math::round(2 * EDSCALE));
	theme->set_stylebox("LaunchPadMovieMode", "EditorStyles", style_launch_pad_movie);
	theme->set_stylebox("MovieWriterButtonNormal", "EditorStyles", make_empty_stylebox(0, 0, 0, 0));
	Ref<StyleBoxFlat> style_write_movie_button = style_widget_pressed->duplicate();
	style_write_movie_button->set_bg_color(accent_color);
	style_write_movie_button->set_corner_radius_all(corner_radius * EDSCALE);
	style_write_movie_button->set_content_margin(SIDE_TOP, 0);
	style_write_movie_button->set_content_margin(SIDE_BOTTOM, 0);
	style_write_movie_button->set_content_margin(SIDE_LEFT, 0);
	style_write_movie_button->set_content_margin(SIDE_RIGHT, 0);
	style_write_movie_button->set_expand_margin(SIDE_RIGHT, 2 * EDSCALE);
	theme->set_stylebox("MovieWriterButtonPressed", "EditorStyles", style_write_movie_button);
	
	theme->set_stylebox("normal", "MenuButton", style_menu);
	theme->set_stylebox("hover", "MenuButton", style_widget_hover);
	theme->set_stylebox("pressed", "MenuButton", style_menu);
	theme->set_stylebox("focus", "MenuButton", style_menu);
	theme->set_stylebox("disabled", "MenuButton", style_menu);
	theme->set_color("font_color", "MenuButton", font_color);
	theme->set_color("font_hover_color", "MenuButton", font_hover_color);
	theme->set_color("font_hover_pressed_color", "MenuButton", font_hover_pressed_color);
	theme->set_color("font_focus_color", "MenuButton", font_focus_color);