### 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)

minimap_resizer_color = Color(0, 0, 0, 0.65);
	}
	theme->set_icon("resizer", "GraphEditMinimap", theme->get_icon(SNAME("GuiResizerTopLeft"), SNAME("EditorIcons")));
	theme->set_color("resizer_color", "GraphEditMinimap", minimap_resizer_color);
	
	const int gn_margin_side = 2;
	const int gn_margin_bottom = 2;
	
	const int sm_margin_side = 10;
	Color graphnode_bg = dark_color_3;
	if (!dark_theme) {
		graphnode_bg = prop_section_color;
	}
	Ref<StyleBoxFlat> graphsb = make_flat_stylebox(graphnode_bg.lerp(style_tree_bg->get_bg_color(), 0.3), gn_margin_side, 24, gn_margin_side, gn_margin_bottom, corner_width);
	graphsb->set_border_width_all(border_width);
	graphsb->set_border_color(graphnode_bg);
	Ref<StyleBoxFlat> graphsbselected = make_flat_stylebox(graphnode_bg * Color(1, 1, 1, 1), gn_margin_side, 24, gn_margin_side, gn_margin_bottom, corner_width);
	graphsbselected->set_border_width_all(2 * EDSCALE + border_width);
	graphsbselected->set_border_color(Color(accent_color.r, accent_color.g, accent_color.b, 0.6));
	Ref<StyleBoxFlat> graphsbcomment = make_flat_stylebox(graphnode_bg * Color(1, 1, 1, 0.3), gn_margin_side, 24, gn_margin_side, gn_margin_bottom, corner_width);
	graphsbcomment->set_border_width_all(border_width);
	graphsbcomment->set_border_color(graphnode_bg);
	Ref<StyleBoxFlat> graphsbcommentselected = make_flat_stylebox(graphnode_bg * Color(1, 1, 1, 0.4), gn_margin_side, 24, gn_margin_side, gn_margin_bottom, corner_width);
	graphsbcommentselected->set_border_width_all(border_width);
	graphsbcommentselected->set_border_color(graphnode_bg);
	Ref<StyleBoxFlat> graphsbbreakpoint = graphsbselected->duplicate();
	graphsbbreakpoint->set_draw_center(false);
	graphsbbreakpoint->set_border_color(warning_color);
	graphsbbreakpoint->set_shadow_color(warning_color * Color(1.0, 1.0, 1.0, 0.1));
	Ref<StyleBoxFlat> graphsbposition = graphsbselected->duplicate();