It has been always like that. Until that is fixed just grow your own mushrooms to avoid spending money on them. If nothing changed you can grow them by making 1 block hole, on bottom of it place dirt or grass block, fill it up with water, plant mushroom of your choice in water and bonemeal it. It should grow into giant mushroom.The "Daily Quest" only says "Mushroom", but there are two mushrooms in the shop, I often buy the wrong one because of that, and I need some help