### 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

‮
resolve_class_body(p_class);
	if (p_recursive) {
		for (int i = 0; i < p_class->members.size(); i++) {
			GDScriptParser::ClassNode::Member member = p_class->members[i];
			if (member.type == GDScriptParser::ClassNode::Member::CLASS) {
				resolve_class_body(member.m_class, true);
			}
		}
	}
}
void GDScriptAnalyzer::resolve_node(GDScriptParser::Node *p_node, bool p_is_root) {