### 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)

return;
		}
	}
	GDScriptParser::DataType base_type;
	call_type.kind = GDScriptParser::DataType::VARIANT;
	bool is_self = false;
	if (p_call->is_super) {
		base_type = parser->current_class->base_type;
		base_type.is_meta_type = false;
		is_self = true;
		if (p_call->callee == nullptr && !lambda_stack.is_empty()) {
			push_error("Cannot use `super()` inside a lambda.", p_call);
		}
	} else if (callee_type == GDScriptParser::Node::IDENTIFIER) {
		base_type = parser->current_class->get_datatype();
		base_type.is_meta_type = false;
		is_self = true;
	} else if (callee_type == GDScriptParser::Node::SUBSCRIPT) {
		GDScriptParser::SubscriptNode *subscript = static_cast<GDScriptParser::SubscriptNode *>(p_call->callee);
		if (subscript->base == nullptr) {
			
			p_call->set_datatype(call_type);
			mark_node_unsafe(p_call);
			return;
		}
		if (!subscript->is_attribute) {
			
			
			p_call->set_datatype(call_type);
			mark_node_unsafe(p_call);