### 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)

add_conversion_color_pair("#ee5677", "#ee7991"); 
	add_conversion_color_pair("#e0e0e0", "#5a5a5a"); 
	add_conversion_color_pair("#e1ec41", "#b2bb19"); 
	add_conversion_color_pair("#54ed9e", "#57e99f"); 
	add_conversion_color_pair("#417aec", "#6993ec"); 
	add_conversion_color_pair("#55f3e3", "#12d5c3"); 
	add_conversion_color_pair("#f74949", "#f77070"); 
	add_conversion_color_pair("#44bd44", "#46b946"); 
	add_conversion_color_pair("#ec418e", "#ec69a3"); 
	add_conversion_color_pair("#f1738f", "#ee758e"); 
	add_conversion_color_pair("#41ec80", "#2ce573"); 
	add_conversion_color_pair("#b9ec41", "#96ce1a"); 
	add_conversion_color_pair("#f68f45", "#f49047"); 
	add_conversion_color_pair("#ac73f1", "#ad76ee"); 
	add_conversion_color_pair("#de66f0", "#dc6aed"); 
	add_conversion_color_pair("#f066bd", "#ed6abd"); 
	
	add_conversion_color_pair("#77ce57", "#67c046"); 
	add_conversion_color_pair("#ea686c", "#d95256"); 
	add_conversion_color_pair("#eac968", "#d9b64f"); 
	add_conversion_color_pair("#cf68ea", "#c050dd"); 
	
	add_conversion_exception("EditorPivot");
	add_conversion_exception("EditorHandle");
	add_conversion_exception("Editor3DHandle");
	add_conversion_exception("EditorBoneHandle");
	add_conversion_exception("Godot");
	add_conversion_exception("Sky");
	add_conversion_exception("EditorControlAnchor");
	add_conversion_exception("DefaultProjectIcon");