### 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 (other_parser->errors.size() > error_count) {
			push_error(vformat(R"(Could not resolve member "%s".)", member.get_name()), p_source);
		}
		return;
	}
	
	if (!p_class->base_type.is_resolving()) {
		Error err = resolve_class_inheritance(p_class);
		if (err) {
			return;
		}
	}
	GDScriptParser::ClassNode *previous_class = parser->current_class;
	parser->current_class = p_class;
	GDScriptParser::DataType resolving_datatype;
	resolving_datatype.kind = GDScriptParser::DataType::RESOLVING;
	{
		switch (member.type) {
			case GDScriptParser::ClassNode::Member::VARIABLE: {
				check_class_member_name_conflict(p_class, member.variable->identifier->name, member.variable);
				member.variable->set_datatype(resolving_datatype);
				resolve_variable(member.variable, false);
				
				for (GDScriptParser::AnnotationNode *&E : member.variable->annotations) {
					resolve_annotation(E);
					E->apply(parser, member.variable);
				}
			} break;
			case GDScriptParser::ClassNode::Member::CONSTANT: {
				check_class_member_name_conflict(p_class, member.constant->identifier->name, member.constant);