### 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)

const Color dark_color_1 = base_color.lerp(Color(0, 0, 0, 1), contrast).clamp();
	const Color dark_color_2 = base_color.lerp(Color(0, 0, 0, 1), contrast * 1.5).clamp();
	const Color dark_color_3 = base_color.lerp(Color(0, 0, 0, 1), contrast * 2).clamp();
	
	const Color extra_border_color_1 = Color(0.5, 0.5, 0.5);
	const Color extra_border_color_2 = dark_theme ? Color(0.3, 0.3, 0.3) : Color(0.7, 0.7, 0.7);
	const Color background_color = dark_color_2;
	
	const Color mono_color = dark_theme ? Color(1, 1, 1) : Color(0, 0, 0);
	const Color contrast_color_1 = base_color.lerp(mono_color, MAX(contrast, default_contrast));
	const Color contrast_color_2 = base_color.lerp(mono_color, MAX(contrast * 1.5, default_contrast * 1.5));
	const Color font_color = mono_color.lerp(base_color, 0.25);
	const Color font_hover_color = mono_color.lerp(base_color, 0.125);
	const Color font_focus_color = mono_color.lerp(base_color, 0.125);
	const Color font_hover_pressed_color = font_hover_color.lerp(accent_color, 0.74);
	const Color font_disabled_color = Color(mono_color.r, mono_color.g, mono_color.b, 0.35);
	const Color font_readonly_color = Color(mono_color.r, mono_color.g, mono_color.b, 0.65);
	const Color font_placeholder_color = Color(mono_color.r, mono_color.g, mono_color.b, 0.6);
	const Color font_outline_color = Color(0, 0, 0, 0);
	const Color selection_color = accent_color * Color(1, 1, 1, 0.4);
	const Color disabled_color = mono_color.inverted().lerp(base_color, 0.7);
	const Color disabled_bg_color = mono_color.inverted().lerp(base_color, 0.9);
	const Color icon_normal_color = Color(1, 1, 1);
	Color icon_hover_color = icon_normal_color * (dark_theme ? 1.15 : 1.45);
	icon_hover_color.a = 1.0;
	Color icon_focus_color = icon_hover_color;
	Color icon_disabled_color = Color(icon_normal_color, 0.4);