### 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
} else {
			after_list_open_tag = false;
		}
		if (!txt.is_empty()) {
			add_text(txt);
		}
		after_list_close_tag = false;
		if (tag == "b") {
			
			in_bold = true;
			if (in_italics) {
				_push_def_font(BOLD_ITALICS_FONT);
			} else {
				_push_def_font(BOLD_FONT);
			}
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "i") {
			
			in_italics = true;
			if (in_bold) {
				_push_def_font(BOLD_ITALICS_FONT);
			} else {
				_push_def_font(ITALICS_FONT);
			}
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "code") {
			
			_push_def_font(MONO_FONT);