### 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)

theme->set_color("font_shadow_color", "Label", Color(0, 0, 0, 0));
	theme->set_color("font_outline_color", "Label", font_outline_color);
	theme->set_constant("shadow_offset_x", "Label", 1 * EDSCALE);
	theme->set_constant("shadow_offset_y", "Label", 1 * EDSCALE);
	theme->set_constant("shadow_outline_size", "Label", 1 * EDSCALE);
	theme->set_constant("line_spacing", "Label", 3 * EDSCALE);
	theme->set_constant("outline_size", "Label", 0);
	
	theme->set_stylebox("focus", "LinkButton", style_empty);
	theme->set_color("font_color", "LinkButton", font_color);
	theme->set_color("font_hover_color", "LinkButton", font_hover_color);
	theme->set_color("font_hover_pressed_color", "LinkButton", font_hover_pressed_color);
	theme->set_color("font_focus_color", "LinkButton", font_focus_color);
	theme->set_color("font_pressed_color", "LinkButton", accent_color);
	theme->set_color("font_disabled_color", "LinkButton", font_disabled_color);
	theme->set_color("font_outline_color", "LinkButton", font_outline_color);
	theme->set_constant("outline_size", "LinkButton", 0);
	
	
	
	Ref<StyleBoxFlat> style_tooltip = style_popup->duplicate();
	style_tooltip->set_shadow_size(0);
	style_tooltip->set_content_margin_all(default_margin_size * EDSCALE * 0.5);
	style_tooltip->set_bg_color(dark_color_3 * Color(0.8, 0.8, 0.8, 0.9));
	style_tooltip->set_border_width_all(0);
	theme->set_color("font_color", "TooltipLabel", font_hover_color);
	theme->set_color("font_shadow_color", "TooltipLabel", Color(0, 0, 0, 0));
	theme->set_stylebox("panel", "TooltipPanel", style_tooltip);
	
	theme->set_stylebox("panel", "PopupPanel", style_popup);