### 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 (res.is_null()) {
						continue;
					}
					Ref<PackedScene> scn = res;
					if (scn.is_valid()) {
						Node *instantiated_scene = scn->instantiate(PackedScene::GEN_EDIT_STATE_INSTANCE);
						if (!instantiated_scene) {
							continue;
						}
						memdelete(instantiated_scene);
					}
					can_instantiate = true;
					break;
				}
			}
			if (can_instantiate) {
				if (!preview_node->get_parent()) { // create preview only once
					_create_preview(files);
				}
				Transform2D trans = canvas_item_editor->get_canvas_transform();
				preview_node->set_position((p_point - trans.get_origin()) / trans.get_scale().x);
				label->set_text(vformat(TTR("Adding %s..."), default_texture_node_type));
			}
			return can_instantiate;
		}
	}
	label->hide();
	return false;
}
void CanvasItemEditorViewport::_show_resource_type_selector() {