### 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)

sub_inspector_bg->set_border_color(si_base_color * Color(0.7, 0.7, 0.7, 0.8));
		sub_inspector_bg->set_content_margin_all(4 * EDSCALE);
		sub_inspector_bg->set_corner_radius(CORNER_TOP_LEFT, 0);
		sub_inspector_bg->set_corner_radius(CORNER_TOP_RIGHT, 0);
		theme->set_stylebox("sub_inspector_bg" + itos(i), "Editor", sub_inspector_bg);
		
		Ref<StyleBoxFlat> bg_color = make_flat_stylebox(si_base_color * Color(0.7, 0.7, 0.7, 0.8), 0, 0, 0, 0, corner_radius);
		bg_color->set_anti_aliased(false);
		bg_color->set_corner_radius(CORNER_BOTTOM_LEFT, 0);
		bg_color->set_corner_radius(CORNER_BOTTOM_RIGHT, 0);
		theme->set_stylebox("sub_inspector_property_bg" + itos(i), "Editor", bg_color);
	}
	theme->set_color("sub_inspector_property_color", "Editor", dark_theme ? Color(1, 1, 1, 1) : Color(0, 0, 0, 1));
	
	theme->set_color("label_color", "EditorSpinSlider", font_color);
	theme->set_color("read_only_label_color", "EditorSpinSlider", font_readonly_color);
	Ref<StyleBoxFlat> editor_spin_label_bg = style_default->duplicate();
	editor_spin_label_bg->set_bg_color(dark_color_3);
	editor_spin_label_bg->set_border_width_all(0);
	theme->set_stylebox("label_bg", "EditorSpinSlider", editor_spin_label_bg);
	
	Ref<StyleBoxFlat> style_property_bg = style_default->duplicate();
	style_property_bg->set_bg_color(highlight_color);
	style_property_bg->set_border_width_all(0);
	Ref<StyleBoxFlat> style_property_child_bg = style_default->duplicate();
	style_property_child_bg->set_bg_color(dark_color_2);
	style_property_child_bg->set_border_width_all(0);
	theme->set_constant("font_offset", "EditorProperty", 8 * EDSCALE);
	theme->set_stylebox("bg_selected", "EditorProperty", style_property_bg);
	theme->set_stylebox("bg", "EditorProperty", Ref<StyleBoxEmpty>(memnew(StyleBoxEmpty)));