The mushrooms growing on the mooshroom turn white

I accidentally found that the mushroom growing in the Mooshroom was completely white in my world, and then I looked for various conditions under which it happened, and first of all, I was able to see the Mooshroom with the inventory open. It became white by doing so, and the second thing became white by having something enchanted with some armor on it. The second condition may not be accurate, but for the time being, it happened by acting like that.