### 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

‮
int warn_level = (int)GLOBAL_GET(GDScriptWarning::get_settings_path_from_code(p_code));
	if (!warn_level) {
		return;
	}
	GDScriptWarning warning;
	warning.code = p_code;
	warning.symbols = p_symbols;
	warning.start_line = p_source->start_line;
	warning.end_line = p_source->end_line;
	warning.leftmost_column = p_source->leftmost_column;
	warning.rightmost_column = p_source->rightmost_column;
	if (warn_level == GDScriptWarning::WarnLevel::ERROR || bool(GLOBAL_GET("debug/gdscript/warnings/treat_warnings_as_errors"))) {
		push_error(warning.get_message(), p_source);
		return;
	}
	List<GDScriptWarning>::Element *before = nullptr;
	for (List<GDScriptWarning>::Element *E = warnings.front(); E; E = E->next()) {
		if (E->get().start_line > warning.start_line) {
			break;
		}
		before = E;
	}
	if (before) {
		warnings.insert_after(before, warning);
	} else {
		warnings.push_front(warning);
	}
}
#endif
void GDScriptParser::make_completion_context(CompletionType p_type, Node *p_node, int p_argument, bool p_force) {