### 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
_stop_thread();
	MutexLock data_lock(data_mutex);
	ERR_FAIL_COND(current->type == ITEM_TABLE);
	ERR_FAIL_COND(p_level < 0);
	ItemList *item = memnew(ItemList);
	item->list_type = p_list;
	item->level = p_level;
	item->capitalize = p_capitalize;
	item->bullet = p_bullet;
	_add_item(item, true, true);
}
void RichTextLabel::push_meta(const Variant &p_meta) {
	_stop_thread();
	MutexLock data_lock(data_mutex);
	ERR_FAIL_COND(current->type == ITEM_TABLE);
	ItemMeta *item = memnew(ItemMeta);
	item->meta = p_meta;
	_add_item(item, true);
}
void RichTextLabel::push_hint(const String &p_string) {
	_stop_thread();
	MutexLock data_lock(data_mutex);
	ERR_FAIL_COND(current->type == ITEM_TABLE);
	ItemHint *item = memnew(ItemHint);
	item->description = p_string;
	_add_item(item, true);
}
void RichTextLabel::push_table(int p_columns, InlineAlignment p_alignment, int p_align_to_row) {