It depends on the bed if this is possible or not. Because 1 tile is either above or below the player, and in this case the player can walk behind that bed, so the top tile of the bed is always in front. I think there are other beds where this is possible.
After I rework the engine to support water, this shouldn’t be a problem anymore, and so tiles can be both in front and behind the player, depending on where the player is.