### 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

‮
for (const MethodInfo &E : methods) {
			if (E.name == p_function) {
				function_signature_from_info(E, r_return_type, r_par_types, r_default_arg_count, r_static, r_vararg);
				r_static = Variant::is_builtin_method_static(p_base_type.builtin_type, function_name);
				
				if (!r_static && was_enum && !(E.flags & METHOD_FLAG_CONST)) {
					push_error(vformat(R"*(Cannot call non-const Dictionary function "%s()" on enum "%s".)*", p_function, p_base_type.enum_type), p_source);
				}
				return true;
			}
		}
		return false;
	}
	StringName base_native = p_base_type.native_type;
	if (base_native != StringName()) {
		
		
		if (!class_exists(base_native)) {
			push_error(vformat("Native class %s used in script doesn't exist or isn't exposed.", base_native), p_source);
			return false;
		} else if (p_is_constructor && !ClassDB::can_instantiate(base_native)) {
			if (p_base_type.kind == GDScriptParser::DataType::CLASS) {
				push_error(vformat(R"(Class "%s" cannot be constructed as it is based on abstract native class "%s".)", p_base_type.class_type->fqcn.get_file(), base_native), p_source);
			} else if (p_base_type.kind == GDScriptParser::DataType::SCRIPT) {
				push_error(vformat(R"(Script "%s" cannot be constructed as it is based on abstract native class "%s".)", p_base_type.script_path.get_file(), base_native), p_source);
			} else {
				push_error(vformat(R"(Native class "%s" cannot be constructed as it is abstract.)", base_native), p_source);
			}
			return false;
		}