### Godot version

v4.1.beta1.official [828ec2c5d]

### System information

Windows 11 Home, v4.1.beta1.official [828ec2c5d], All Renderers, NVidia GeForce RTX 3060 Ti,  Drivers 535.98

### Issue description

When enabling the "Y Sort Enabled" ordering method for a Sprite2D, the sprite will be rendered entirely black.

![grafik](https://github.com/godotengine/godot/assets/29011290/6fa4da16-d9a5-4c3b-a9e4-c1bba53c2183)
![grafik](https://github.com/godotengine/godot/assets/29011290/cbf499ae-f3f7-4c07-98b2-a1a667d810c2)


### Steps to reproduce

Simply create a Sprite2D Node, assign any texture to it and activate Y-Sorting

### Minimal reproduction project

[GDB_4.1_ysort.zip](https://github.com/godotengine/godot/files/11704361/GDB_4.1_ysort.zip)

Item *canvas_item = canvas_item_owner.get_or_null(p_item);
	ERR_FAIL_COND(!canvas_item);
	if (p_enable && (canvas_item->copy_back_buffer == nullptr)) {
		canvas_item->copy_back_buffer = memnew(RendererCanvasRender::Item::CopyBackBuffer);
	}
	if (!p_enable && (canvas_item->copy_back_buffer != nullptr)) {
		memdelete(canvas_item->copy_back_buffer);
		canvas_item->copy_back_buffer = nullptr;
	}
	if (p_enable) {
		canvas_item->copy_back_buffer->rect = p_rect;
		canvas_item->copy_back_buffer->full = p_rect == Rect2();
	}
}
void RendererCanvasCull::canvas_item_clear(RID p_item) {