### 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("#e0e0e0", "#5a5a5a"); 
	add_conversion_color_pair("#fefefe", "#fefefe"); 
	add_conversion_color_pair("#808080", "#808080"); 
	add_conversion_color_pair("#b3b3b3", "#363636"); 
	add_conversion_color_pair("#699ce8", "#699ce8"); 
	add_conversion_color_pair("#f9f9f9", "#606060"); 
	add_conversion_color_pair("#c38ef1", "#a85de9"); 
	add_conversion_color_pair("#fc7f7f", "#cd3838"); 
	add_conversion_color_pair("#8da5f3", "#3d64dd"); 
	add_conversion_color_pair("#4b70ea", "#1a3eac"); 
	add_conversion_color_pair("#8eef97", "#2fa139"); 
	add_conversion_color_pair("#5fb2ff", "#0079f0"); 
	add_conversion_color_pair("#003e7a", "#2b74bb"); 
	add_conversion_color_pair("#f7f5cf", "#615f3a"); 
	
	add_conversion_color_pair("#ff4545", "#ff2929"); 
	add_conversion_color_pair("#ffe345", "#ffe337"); 
	add_conversion_color_pair("#80ff45", "#74ff34"); 
	add_conversion_color_pair("#45ffa2", "#2cff98"); 
	add_conversion_color_pair("#45d7ff", "#22ccff"); 
	add_conversion_color_pair("#8045ff", "#702aff"); 
	add_conversion_color_pair("#ff4596", "#ff2781"); 
	
	add_conversion_color_pair("#e1da5b", "#d6cf4b"); 
	add_conversion_color_pair("#62aeff", "#1678e0"); 
	add_conversion_color_pair("#75d1e6", "#41acc5"); 
	add_conversion_color_pair("#84ffee", "#49ccba"); 
	add_conversion_color_pair("#f70000", "#c91616"); 
	add_conversion_color_pair("#eec315", "#d58c0b"); 
	add_conversion_color_pair("#dbee15", "#b7d10a");