### 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("#288027", "#218309"); 
	
	add_conversion_color_pair("#ffca5f", "#fea900"); 
	add_conversion_color_pair("#2998ff", "#68b6ff"); 
	add_conversion_color_pair("#a2d2ff", "#4998e3"); 
	add_conversion_color_pair("#69c4d4", "#29a3cc"); 
	
	
	add_conversion_color_pair("#ea7940", "#bd5e2c"); 
	add_conversion_color_pair("#ff2b88", "#bd165f"); 
	add_conversion_color_pair("#eac840", "#bd9d1f"); 
	add_conversion_color_pair("#3cf34e", "#16a827"); 
	add_conversion_color_pair("#2877f6", "#236be6"); 
	add_conversion_color_pair("#eae440", "#9f9722"); 
	add_conversion_color_pair("#a448f0", "#9853ce"); 
	add_conversion_color_pair("#5ad5c4", "#0a9c88"); 
	
	add_conversion_color_pair("#d6d6d6", "#474747"); 
	add_conversion_color_pair("#474747", "#d6d6d6"); 
	add_conversion_color_pair("#919191", "#6e6e6e"); 
	
	add_conversion_color_pair("#fce00e", "#aa8d24"); 
	add_conversion_color_pair("#0e71fc", "#0350bd"); 
	add_conversion_color_pair("#c6ced4", "#828f9b"); 
	
	add_conversion_color_pair("#41ecad", "#25e3a0"); 
	add_conversion_color_pair("#6f91f0", "#6d8eeb"); 
	add_conversion_color_pair("#5abbef", "#4fb2e9"); 
	add_conversion_color_pair("#35d4f4", "#27ccf0"); 
	add_conversion_color_pair("#4593ec", "#4690e7");