### 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)

parser->push_warning(member.variable, GDScriptWarning::ONREADY_WITH_EXPORT);
				}
				if (member.variable->initializer) {
					
					
					if (!member.variable->is_static && !member.variable->onready && member.variable->initializer && (member.variable->initializer->type == GDScriptParser::Node::GET_NODE || member.variable->initializer->type == GDScriptParser::Node::CALL || member.variable->initializer->type == GDScriptParser::Node::CAST)) {
						GDScriptParser::Node *expr = member.variable->initializer;
						if (expr->type == GDScriptParser::Node::CAST) {
							expr = static_cast<GDScriptParser::CastNode *>(expr)->operand;
						}
						bool is_get_node = expr->type == GDScriptParser::Node::GET_NODE;
						bool is_using_shorthand = is_get_node;
						if (!is_get_node && expr->type == GDScriptParser::Node::CALL) {
							is_using_shorthand = false;
							GDScriptParser::CallNode *call = static_cast<GDScriptParser::CallNode *>(expr);
							if (call->function_name == SNAME("get_node")) {
								switch (call->get_callee_type()) {
									case GDScriptParser::Node::IDENTIFIER: {
										is_get_node = true;
									} break;
									case GDScriptParser::Node::SUBSCRIPT: {
										GDScriptParser::SubscriptNode *subscript = static_cast<GDScriptParser::SubscriptNode *>(call->callee);
										is_get_node = subscript->is_attribute && subscript->base->type == GDScriptParser::Node::SELF;
									} break;
									default:
										break;
								}
							}
						}
						if (is_get_node) {