Dissappearing Leads

Leads used to attach horses to fenceposts tend to dissappear after some time playing in the world. The lead is still there yet the texture isn't loaded. Re-logging into the world will have the lead re-appear. NOTE: when this happen the player can't interact with the lead and will cause the horse to be stuck to the fencepost. (Picture will be added when I see it again) this is also in single-player.