### Godot version

3b086aa06

### System information

ArchLinux x11

### Issue description

```gdscript
extends Node

@export_group("My Properties")
@export var number = 3
@export var string = ""

@export_group("Prefixed Properties", "prefix_")
@export var prefix_number = 3
@export var prefix_string = ""

@export_group("", "")
@export var ungrouped_number = 3
```

![image](https://user-images.githubusercontent.com/70787919/214983963-528c415b-745b-47fc-9777-36ebe31a3060.png)


### Steps to reproduce

- create script
- @export_group
- go inspector

### Minimal reproduction project

‮
if (class_exists(native)) {
		MethodInfo method_info;
		if (ClassDB::has_property(native, name)) {
			StringName getter_name = ClassDB::get_property_getter(native, name);
			MethodBind *getter = ClassDB::get_method(native, getter_name);
			if (getter != nullptr) {
				p_identifier->set_datatype(type_from_property(getter->get_return_info()));
				p_identifier->source = GDScriptParser::IdentifierNode::INHERITED_VARIABLE;
			}
			return;
		}
		if (ClassDB::get_method_info(native, name, &method_info)) {
			
			p_identifier->set_datatype(make_callable_type(method_info));
			p_identifier->source = GDScriptParser::IdentifierNode::INHERITED_VARIABLE;
			return;
		}
		if (ClassDB::get_signal(native, name, &method_info)) {
			
			p_identifier->set_datatype(make_signal_type(method_info));
			p_identifier->source = GDScriptParser::IdentifierNode::INHERITED_VARIABLE;
			return;
		}
		if (ClassDB::has_enum(native, name)) {
			p_identifier->set_datatype(make_native_enum_type(name, native));
			p_identifier->source = GDScriptParser::IdentifierNode::MEMBER_CONSTANT;
			return;
		}
		bool valid = false;
		int64_t int_constant = ClassDB::get_integer_constant(native, name, &valid);