### 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)

bool is_valid = false;
		Variant value = base_value.get(index_value, &is_valid);
		if (is_valid) {
			is_reduced = true;
			return value;
		} else {
			return Variant();
		}
	}
}
Array GDScriptAnalyzer::make_array_from_element_datatype(const GDScriptParser::DataType &p_element_datatype, const GDScriptParser::Node *p_source_node) {
	Array array;
	if (p_element_datatype.builtin_type == Variant::OBJECT) {
		Ref<Script> script_type = p_element_datatype.script_type;
		if (p_element_datatype.kind == GDScriptParser::DataType::CLASS && script_type.is_null()) {
			Error err = OK;
			Ref<GDScript> scr = GDScriptCache::get_shallow_script(p_element_datatype.script_path, err);
			if (err) {
				push_error(vformat(R"(Error while getting cache for script "%s".)", p_element_datatype.script_path), p_source_node);
				return array;
			}
			script_type.reference_ptr(scr->find_class(p_element_datatype.class_type->fqcn));
		}
		array.set_typed(p_element_datatype.builtin_type, p_element_datatype.native_type, script_type);
	} else {
		array.set_typed(p_element_datatype.builtin_type, StringName(), Variant());
	}
	return array;
}
Variant GDScriptAnalyzer::make_variable_default_value(GDScriptParser::VariableNode *p_variable) {