### 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

‮
}
		}
		validate_call_arg(par_types, default_arg_count, is_vararg, p_call);
		if (base_type.kind == GDScriptParser::DataType::ENUM && base_type.is_meta_type) {
			
			base_type.is_meta_type = false;
		}
		if (is_self && parser->current_function != nullptr && parser->current_function->is_static && !is_static) {
			
			GDScriptParser::FunctionNode *parent_function = parser->current_function;
			while (parent_function->source_lambda) {
				parent_function = parent_function->source_lambda->parent_function;
			}
			push_error(vformat(R"*(Cannot call non-static function "%s()" from static function "%s()".)*", p_call->function_name, parent_function->identifier->name), p_call);
		} else if (!is_self && base_type.is_meta_type && !is_static) {
			base_type.is_meta_type = false; 
			push_error(vformat(R"*(Cannot call non-static function "%s()" on the class "%s" directly. Make an instance instead.)*", p_call->function_name, base_type.to_string()), p_call);
		} else if (is_self && !is_static) {
			mark_lambda_use_self();
		}
		if (!p_is_root && !p_is_await && return_type.is_hard_type() && return_type.kind == GDScriptParser::DataType::BUILTIN && return_type.builtin_type == Variant::NIL) {
			push_error(vformat(R"*(Cannot get return value of call to "%s()" because it returns "void".)*", p_call->function_name), p_call);
		}
#ifdef DEBUG_ENABLED
		if (p_is_root && return_type.kind != GDScriptParser::DataType::UNRESOLVED && return_type.builtin_type != Variant::NIL) {
			parser->push_warning(p_call, GDScriptWarning::RETURN_VALUE_DISCARDED, p_call->function_name);
		}
		if (is_static && !base_type.is_meta_type && !(is_self && parser->current_function != nullptr && parser->current_function->is_static)) {
			String caller_type = String(base_type.native_type);
			if (caller_type.is_empty()) {