### 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)

case NOTIFICATION_READY: {
			zoom_out->set_icon(get_theme_icon(SNAME("ZoomLess"), SNAME("EditorIcons")));
			zoom_reset->set_icon(get_theme_icon(SNAME("ZoomReset"), SNAME("EditorIcons")));
			zoom_in->set_icon(get_theme_icon(SNAME("ZoomMore"), SNAME("EditorIcons")));
			vscroll->set_anchors_and_offsets_preset(Control::PRESET_RIGHT_WIDE);
			hscroll->set_anchors_and_offsets_preset(Control::PRESET_BOTTOM_WIDE);
			[[fallthrough]];
		}
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			panner->setup((ViewPanner::ControlScheme)EDITOR_GET("editors/panning/sub_editors_panning_scheme").operator int(), ED_GET_SHORTCUT("canvas_item_editor/pan_view"), bool(EDITOR_GET("editors/panning/simple_panning")));
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (snap_mode == SNAP_AUTOSLICE && is_visible() && autoslice_is_dirty) {
				_update_autoslice();
			}
			if (!is_visible()) {
				EditorSettings::get_singleton()->set_project_metadata("texture_region_editor", "snap_step", snap_step);
				EditorSettings::get_singleton()->set_project_metadata("texture_region_editor", "snap_separation", snap_separation);
				EditorSettings::get_singleton()->set_project_metadata("texture_region_editor", "snap_mode", snap_mode);
			}
		} break;
		case NOTIFICATION_WM_WINDOW_FOCUS_IN: {
			
			
			cache_map.clear();
			_edit_region();
		} break;
	}
}
void TextureRegionEditor::_node_removed(Object *p_obj) {