### Godot version

ef025711a

### System information

ArchLinux x11

### Issue description

Accessing a scene unique node like this:
```gdscript
class_name Class extends Node
static func get_label() -> Label:
	return %label
```
and then accessing that class later:
```gdscript
func _ready() -> void:
	Main.get_label().text = "hello world"
```
causes a strange error when in the editor, and a normal error when run directly.
![image](https://user-images.githubusercontent.com/70787919/229785642-6aad4e31-6bd9-4eb5-bee4-7445b48a99bb.png)
```c++
ERROR: Node not found: "%label" (relative to "/root/main").
   at: get_node (scene/main/node.cpp:1364)
```
Instead of returning null.
As opposed to when using `get_node`:
```

SCRIPT ERROR: Cannot call method 'get_node' on a null value.
          at: get_label (res://main.gd:5)
SCRIPT ERROR: Invalid set index 'text' (on base: 'Nil') with value of type 'String'.
          at: _ready (res://control.gd:4)
```

### Steps to reproduce

Run mrp or follow outlined steps

### Minimal reproduction project

[bug.zip](https://github.com/godotengine/godot/files/11148287/bug.zip)

ClassDocData result;
	const HashMap<int, GDScriptTokenizer::CommentData> &comments = tokenizer.get_comments();
	ERR_FAIL_COND_V(!comments.has(p_line), result);
	if (p_single_line) {
		if (comments[p_line].comment.begins_with("##")) {
			result.brief = comments[p_line].comment.trim_prefix("##").strip_edges();
			return result;
		}
		return result;
	}
	int line = p_line;
	DocLineState state = DOC_LINE_NORMAL;
	bool is_in_brief = true;
	if (p_inner_class) {
		while (comments.has(line - 1)) {
			if (!comments[line - 1].new_line || !comments[line - 1].comment.begins_with("##")) {
				break;
			}
			line--;
		}
	}
	String space_prefix;
	if (comments.has(line) && comments[line].comment.begins_with("##")) {
		int i = 2;