### 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

‮
push_error(vformat(R"(Could not resolve class "%s".)", p_class->fqcn), p_source);
			}
			return;
		}
		p_class->resolved_interface = true;
		if (resolve_class_inheritance(p_class) != OK) {
			return;
		}
		GDScriptParser::DataType base_type = p_class->base_type;
		if (base_type.kind == GDScriptParser::DataType::CLASS) {
			GDScriptParser::ClassNode *base_class = base_type.class_type;
			resolve_class_interface(base_class, p_class);
		}
		for (int i = 0; i < p_class->members.size(); i++) {
			resolve_class_member(p_class, i);
		}
	}
}
void GDScriptAnalyzer::resolve_class_interface(GDScriptParser::ClassNode *p_class, bool p_recursive) {
	resolve_class_interface(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_interface(member.m_class, true);
			}
		}
	}
}
void GDScriptAnalyzer::resolve_class_body(GDScriptParser::ClassNode *p_class, const GDScriptParser::Node *p_source) {