### Godot version

2992ffd25523cb8b3e0ef1b873c40115b8940178

### System information

Windows 10

### Issue description

Godot crashes randomly within a few seconds after project start when moving with the mouse.

![win_err](https://github.com/godotengine/godot/assets/52464204/1da28596-d95b-40f3-b32f-12219ec02c5d)

Started after recent merge of https://github.com/godotengine/godot/pull/67791.
I can confirm that reverting the pr fixes the crashes.

### Steps to reproduce

see desc

### Minimal reproduction project

N/A
ERR_MAIN_THREAD_GUARD;
	if (embedder) {
		embedder->_sub_window_grab_focus(this);
	} else if (window_id != DisplayServer::INVALID_WINDOW_ID) {
		DisplayServer::get_singleton()->window_move_to_foreground(window_id);
	}
}
bool Window::has_focus() const {
	ERR_READ_THREAD_GUARD_V(false);
	if (window_id != DisplayServer::INVALID_WINDOW_ID) {
		return DisplayServer::get_singleton()->window_is_focused(window_id);
	}
	return focused;
}
Rect2i Window::get_usable_parent_rect() const {
	ERR_READ_THREAD_GUARD_V(Rect2i());
	ERR_FAIL_COND_V(!is_inside_tree(), Rect2());
	Rect2i parent_rect;
	if (is_embedded()) {
		parent_rect = get_embedder()->get_visible_rect();
	} else {
		const Window *w = is_visible() ? this : get_parent_visible_window();
		
		ERR_FAIL_NULL_V(w, Rect2());
		parent_rect = DisplayServer::get_singleton()->screen_get_usable_rect(DisplayServer::get_singleton()->window_get_current_screen(w->get_window_id()));
	}
	return parent_rect;
}
void Window::add_child_notify(Node *p_child) {