### Godot version

4.0 beta 10, mono edition

### System information

Windows 11

### Issue description

No matter what I do Project Camera Override can never detect a game instance.

![image](https://user-images.githubusercontent.com/13719743/209912444-541f642a-42d3-4860-a4e0-54a17dbbab0b.png)

Of relevance: I can see remote nodes. I can see the output in the console. I can see the output in my IDE of choice (Rider). I can toggle debug mode.

It's just the camera that is unable to detect the game instance.

### Steps to reproduce

This happens everywhere, including on a brand new projects where the only nodes are a 2d camera and the Godot svg icon for testing. This also seems to happen when not using Rider as a third party editor.

### Minimal reproduction project

N/A
if (!p_node) {
		return;
	}
	if (Object::cast_to<Viewport>(p_node)) {
		return;
	}
	const CanvasItem *ci = Object::cast_to<CanvasItem>(p_node);
	for (int i = p_node->get_child_count() - 1; i >= 0; i--) {
		if (ci && !ci->is_set_as_top_level()) {
			_expand_encompassing_rect_using_children(r_rect, p_node->get_child(i), r_first, p_parent_xform * ci->get_transform(), p_canvas_xform);
		} else {
			const CanvasLayer *cl = Object::cast_to<CanvasLayer>(p_node);
			_expand_encompassing_rect_using_children(r_rect, p_node->get_child(i), r_first, Transform2D(), cl ? cl->get_transform() : p_canvas_xform);
		}
	}
	if (ci && ci->is_visible_in_tree() && (include_locked_nodes || !_is_node_locked(ci))) {
		Transform2D xform = p_canvas_xform;