### Godot version

4.1.rc.custom_build. c83f912bc

### System information

Ubuntu 22.04 CI

### Issue description

When executing
```
extends Node
func _process(delta):

	var temp_variable35241 = RichTextLabel.new()
	add_child(temp_variable35241)
	temp_variable35241.set_fit_content(true)
	temp_variable35241.parse_bbcode("3188932498")
	temp_variable35241.queue_free()
```
this code freeze project in CI for at least 60 seconds

### Steps to reproduce

Above

### Minimal reproduction project

N/A
set_current_thread_safe_for_nodes(true);
	_process_line_caches();
	updating.store(false);
	call_deferred(SNAME("thread_end"));
}
void RichTextLabel::_thread_end() {
	set_physics_process_internal(false);
	if (is_visible_in_tree()) {
		queue_redraw();
	}
}
void RichTextLabel::_stop_thread() {
	if (threaded) {
		stop_thread.store(true);
		if (task != WorkerThreadPool::INVALID_TASK_ID) {
			WorkerThreadPool::get_singleton()->wait_for_task_completion(task);
			task = WorkerThreadPool::INVALID_TASK_ID;
		}
	}
}
int RichTextLabel::get_pending_paragraphs() const {