More specifics would be helpful, did your house just vanish? Did u build a bed somewhere else and claim it, losing the bed marker on the map from your house and forgot where it was? Was it attacked by trolls and demolished? Not to say it couldn't have been a bug, but i've never lost a base from just vanishing. Map pin mods help, also playing a custom pin on the map where your bases are prevents you from just losing where they are.