### 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 (int i = 0; i < p_call->arguments.size(); i++) {
		if (i >= p_par_types.size()) {
			
			break;
		}
		GDScriptParser::DataType par_type = p_par_types[i];
		if (par_type.is_hard_type() && p_call->arguments[i]->is_constant) {
			update_const_expression_builtin_type(p_call->arguments[i], par_type, "pass");
		}
		GDScriptParser::DataType arg_type = p_call->arguments[i]->get_datatype();
		if ((arg_type.is_variant() || !arg_type.is_hard_type()) && !(par_type.is_hard_type() && par_type.is_variant())) {
			
			mark_node_unsafe(p_call->arguments[i]);
		} else if (par_type.is_hard_type() && !is_type_compatible(par_type, arg_type, true)) {
			
			mark_node_unsafe(p_call);
			if (!is_type_compatible(arg_type, par_type)) {
				push_error(vformat(R"*(Invalid argument for "%s()" function: argument %d should be "%s" but is "%s".)*",
								   p_call->function_name, i + 1, par_type.to_string(), arg_type.to_string()),
						p_call->arguments[i]);
			}
#ifdef DEBUG_ENABLED
		} else if (par_type.kind == GDScriptParser::DataType::BUILTIN && par_type.builtin_type == Variant::INT && arg_type.kind == GDScriptParser::DataType::BUILTIN && arg_type.builtin_type == Variant::FLOAT) {
			parser->push_warning(p_call, GDScriptWarning::NARROWING_CONVERSION, p_call->function_name);
#endif
		}
	}
}
#ifdef DEBUG_ENABLED
bool GDScriptAnalyzer::is_shadowing(GDScriptParser::IdentifierNode *p_local, const String &p_context) {