### 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(parser->head, true);
	return parser->errors.is_empty() ? OK : ERR_PARSE_ERROR;
}
Error GDScriptAnalyzer::resolve_dependencies() {
	for (KeyValue<String, Ref<GDScriptParserRef>> &K : depended_parsers) {
		if (K.value.is_null()) {
			return ERR_PARSE_ERROR;
		}
		K.value->raise_status(GDScriptParserRef::INHERITANCE_SOLVED);
	}
	return parser->errors.is_empty() ? OK : ERR_PARSE_ERROR;
}
Error GDScriptAnalyzer::analyze() {
	parser->errors.clear();
	Error err = OK;
	err = resolve_inheritance();
	if (err) {
		return err;
	}
	resolve_interface();
	resolve_body();
	if (!parser->errors.is_empty()) {
		return ERR_PARSE_ERROR;
	}
	return resolve_dependencies();
}
GDScriptAnalyzer::GDScriptAnalyzer(GDScriptParser *p_parser) {
	parser = p_parser;
}