### 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

‮
result.builtin_type = Variant::BOOL;
	} else if (left_type.is_variant() || right_type.is_variant()) {
		
		result.kind = GDScriptParser::DataType::VARIANT;
		mark_node_unsafe(p_binary_op);
	} else if (p_binary_op->variant_op < Variant::OP_MAX) {
		bool valid = false;
		result = get_operation_type(p_binary_op->variant_op, left_type, right_type, valid, p_binary_op);
		if (!valid) {
			push_error(vformat(R"(Invalid operands "%s" and "%s" for "%s" operator.)", left_type.to_string(), right_type.to_string(), Variant::get_operator_name(p_binary_op->variant_op)), p_binary_op);
		}
	} else {
		ERR_PRINT("Parser bug: unknown binary operation.");
	}
	p_binary_op->set_datatype(result);
}
void GDScriptAnalyzer::reduce_call(GDScriptParser::CallNode *p_call, bool p_is_await, bool p_is_root) {
	bool all_is_constant = true;
	HashMap<int, GDScriptParser::ArrayNode *> arrays; 
	for (int i = 0; i < p_call->arguments.size(); i++) {
		reduce_expression(p_call->arguments[i]);
		if (p_call->arguments[i]->type == GDScriptParser::Node::ARRAY) {
			arrays[i] = static_cast<GDScriptParser::ArrayNode *>(p_call->arguments[i]);
		}
		all_is_constant = all_is_constant && p_call->arguments[i]->is_constant;
	}
	GDScriptParser::Node::Type callee_type = p_call->get_callee_type();
	GDScriptParser::DataType call_type;
	if (!p_call->is_super && callee_type == GDScriptParser::Node::IDENTIFIER) {