Furnace in village, randomly turns when lit

I was cooking potatoes in the furnace, and when I put lava into the furnace, it turned left! I was so confused. Every time I light it up with wood, lava, ect, it turns left. I don't know why! *In the first attachment I put, minecraft furnace glitch.png, the top furnace its when it's lit, and the bottom is before it was lit.*