### 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 {
		if (p_item->subitems.size() && p_item->type != ITEM_TABLE) {
			return p_item->subitems.front()->get();
		} else if (p_item->type == ITEM_FRAME) {
			return nullptr;
		} else if (p_item->E->next()) {
			return p_item->E->next()->get();
		} else {
			
			while (p_item->type != ITEM_FRAME && !p_item->E->next()) {
				p_item = p_item->parent;
			}
			if (p_item->type != ITEM_FRAME) {
				return p_item->E->next()->get();
			} else {
				return nullptr;
			}
		}
	}
}
RichTextLabel::Item *RichTextLabel::_get_prev_item(Item *p_item, bool p_free) const {
	if (p_free) {
		if (p_item->subitems.size()) {
			return p_item->subitems.back()->get();
		} else if (!p_item->parent) {
			return nullptr;
		} else if (p_item->E->prev()) {
			return p_item->E->prev()->get();
		} else {