### 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
if (!is_visible()) {
		return 0;
	}
	const_cast<RichTextLabel *>(this)->_validate_line_caches();
	return visible_paragraph_count;
}
void RichTextLabel::scroll_to_line(int p_line) {
	if (p_line <= 0) {
		vscroll->set_value(0);
		return;
	}
	_validate_line_caches();
	int line_count = 0;
	int to_line = main->first_invalid_line.load();
	for (int i = 0; i < to_line; i++) {
		MutexLock lock(main->lines[i].text_buf->get_mutex());
		if ((line_count <= p_line) && (line_count + main->lines[i].text_buf->get_line_count() >= p_line)) {
			float line_offset = 0.f;
			for (int j = 0; j < p_line - line_count; j++) {
				line_offset += main->lines[i].text_buf->get_line_size(j).y + theme_cache.line_separation;
			}
			vscroll->set_value(main->lines[i].offset.y + line_offset);
			return;
		}
		line_count += main->lines[i].text_buf->get_line_count();
	}
	vscroll->set_value(vscroll->get_max());
}
float RichTextLabel::get_line_offset(int p_line) {