### 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

‮
#ifdef DEBUG_ENABLED
	bool has_error = false;
	for (const Variant &warning_name : p_annotation->resolved_arguments) {
		GDScriptWarning::Code warning = GDScriptWarning::get_code_from_name(String(warning_name).to_upper());
		if (warning == GDScriptWarning::WARNING_MAX) {
			push_error(vformat(R"(Invalid warning name: "%s".)", warning_name), p_annotation);
			has_error = true;
		} else {
			p_node->ignored_warnings.push_back(warning);
		}
	}
	return !has_error;
#else 
	
	return true;
#endif 
}
bool GDScriptParser::rpc_annotation(const AnnotationNode *p_annotation, Node *p_node) {