### 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

‮
}
	p_return->set_datatype(result);
}
void GDScriptAnalyzer::reduce_expression(GDScriptParser::ExpressionNode *p_expression, bool p_is_root) {
	
	if (p_expression == nullptr) {
		return;
	}
	if (p_expression->reduced) {
		
		return;
	}
	p_expression->reduced = true;
	switch (p_expression->type) {
		case GDScriptParser::Node::ARRAY:
			reduce_array(static_cast<GDScriptParser::ArrayNode *>(p_expression));
			break;
		case GDScriptParser::Node::ASSIGNMENT:
			reduce_assignment(static_cast<GDScriptParser::AssignmentNode *>(p_expression));
			break;
		case GDScriptParser::Node::AWAIT:
			reduce_await(static_cast<GDScriptParser::AwaitNode *>(p_expression));
			break;
		case GDScriptParser::Node::BINARY_OPERATOR:
			reduce_binary_op(static_cast<GDScriptParser::BinaryOpNode *>(p_expression));
			break;
		case GDScriptParser::Node::CALL:
			reduce_call(static_cast<GDScriptParser::CallNode *>(p_expression), false, p_is_root);
			break;
		case GDScriptParser::Node::CAST: