### 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
ItemFont *font_it = _find_font(current);
				if (font_it) {
					if (font_it->font.is_valid()) {
						font = font_it->font;
						def_font = font_it->def_font;
					}
				}
				Dictionary features;
				for (int i = 0; i < subtag.size(); i++) {
					Vector<String> subtag_a = subtag[i].split("=");
					_normalize_subtags(subtag_a);
					if (subtag_a.size() == 2) {
						features[TS->name_to_tag(subtag_a[0])] = subtag_a[1].to_int();
					} else if (subtag_a.size() == 1) {
						features[TS->name_to_tag(subtag_a[0])] = 1;
					}
				}
				Ref<FontVariation> fc;
				fc.instantiate();
				fc->set_base_font(font);
				fc->set_opentype_features(features);
				if (def_font != CUSTOM_FONT) {
					_push_def_font_var(def_font, fc);
				} else {
					push_font(fc);
				}
			}
			pos = brk_end + 1;
			tag_stack.push_front(tag.substr(0, value_pos));
		} else if (tag.begins_with("font=")) {