### Godot version

4.0.3-stable

### System information

Windows 10

### Issue description

In some projects ViewportTexture remains pink and doesn't render viewport content after upgrading from 4.0.2-stable to 4.0.3-stable. If a pair of files viewport.h/viewport.cpp are downgraded back to what they were in 4.0.2-stable, problem goes away.

This is how it looks in 4.0.3-stable:
![4 0 3_stable_viewport_4 0 3](https://github.com/godotengine/godot/assets/1449921/44c191a9-4b67-4b02-90b6-4ab615f62a73)

And this is how it looks if viewport.h/viewport.cpp are downgraded back to what they were in 4.0.2-stable.
![4 0 3_stable_viewport_4 0 2](https://github.com/godotengine/godot/assets/1449921/f5abc605-f129-4222-9c0e-e9a07621dd9d)



### Steps to reproduce

Unfortunately, I cannot come up wit a simple demo project reproducing the problem. It exists in some projects and doesn't exist in others.


### Minimal reproduction project

Cannot produce a simple project reproducing the problem. In simple projects it works fine.
Vector2 pos = p_pos;
	String tooltip;
	while (p_control) {
		tooltip = p_control->get_tooltip(pos);
		
		PopupMenu *menu = Object::cast_to<PopupMenu>(this);
		if (menu) {
			tooltip = menu->get_tooltip(pos);
		}
		if (r_tooltip_owner) {
			*r_tooltip_owner = p_control;
		}
		
		if (!tooltip.is_empty()) {
			break;
		}
		
		if (p_control->data.mouse_filter == Control::MOUSE_FILTER_STOP) {
			break;
		}
		if (p_control->is_set_as_top_level()) {
			break;
		}
		
		pos = p_control->get_transform().xform(pos);
		p_control = p_control->get_parent_control();
	}
	return tooltip;
}
void Viewport::_gui_show_tooltip() {